fix: flakey test for EndpointTraceItemAttributeNames (#6523)

The bug:

I was querying for the attributes and they look something like this
```
a_tag_1
a_tag_2
...
a_tag_30
http.status
sentry.environment
...
```
The `a_tag` attributes I created and know where they're coming from. The
others like `http.status` idk where they come from, and it turns out
that they will be different on the local machine and in CI. I hard coded
them to what they are on my local machine but they were different in CI
sometimes which caused the tests to fail.

The way previous tests handled this was only validating the first 10
```
a_tag_1
...
a_tag_10
```
so they never encountered the changing attributes like `http.status`.
But I didnt like this too much since its ignoring a lot of the other
results (like 11 through 30).

I decided to solve the bug by validating only all the `a_tag` and
allowing any arbitrary extra attributes
```
a_tag_1
...
a_tag_30
```
(so now `http.status` can be there, or not it doesnt matter)

tests/web/rpc/v1/test_endpoint_trace_item_attribute_names.py

@@ -100,7 +100,7 @@ def test_basic(self) -> None:
                     seconds=int((BASE_TIME + timedelta(days=1)).timestamp())
                 ),
             ),
-            limit=1000,
+            limit=TOTAL_GENERATED_ATTR_PER_TYPE,
             type=AttributeKey.Type.TYPE_STRING,
             value_substring_match="",
         )
@@ -113,23 +113,6 @@ def test_basic(self) -> None:
                     name=f"a_tag_{str(i).zfill(3)}", type=AttributeKey.Type.TYPE_STRING
                 )
             )
-        expected += [
-            TraceItemAttributeNamesResponse.Attribute(
-                name="http.status_code", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.category", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.name", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.segment_name", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.service", type=AttributeKey.Type.TYPE_STRING
-            ),
-        ]
         assert res.attributes == expected
 
     def test_simple_float(self) -> None:
@@ -146,7 +129,7 @@ def test_simple_float(self) -> None:
                     seconds=int((BASE_TIME + timedelta(days=1)).timestamp())
                 ),
             ),
-            limit=1000,
+            limit=TOTAL_GENERATED_ATTR_PER_TYPE,
             type=AttributeKey.Type.TYPE_FLOAT,
             value_substring_match="",
         )
@@ -159,11 +142,6 @@ def test_simple_float(self) -> None:
                     type=AttributeKey.Type.TYPE_FLOAT,
                 )
             )
-        expected.append(
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.duration_ms", type=AttributeKey.Type.TYPE_FLOAT
-            )
-        )
         assert res.attributes == expected
 
     def test_with_filter(self) -> None:
@@ -180,7 +158,7 @@ def test_with_filter(self) -> None:
                     seconds=int((BASE_TIME + timedelta(days=1)).timestamp())
                 ),
             ),
-            limit=1000,
+            limit=TOTAL_GENERATED_ATTR_PER_TYPE,
             type=AttributeKey.Type.TYPE_STRING,
             value_substring_match="28",
         )
@@ -203,28 +181,11 @@ def test_with_page_token(self) -> None:
                     type=AttributeKey.Type.TYPE_STRING,
                 )
             )
-        expected_attributes += [
-            TraceItemAttributeNamesResponse.Attribute(
-                name="http.status_code", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.category", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.name", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.segment_name", type=AttributeKey.Type.TYPE_STRING
-            ),
-            TraceItemAttributeNamesResponse.Attribute(
-                name="sentry.service", type=AttributeKey.Type.TYPE_STRING
-            ),
-        ]
-        # we just get the first 10
-        limit = 10
+        # grab 10 at a time until we get them all
+        done = 0
         page_token = None
-        while True:
-            # and grab `limit` at a time until we get them all
+        at_a_time = 10
+        while done < TOTAL_GENERATED_ATTR_PER_TYPE:
             req = TraceItemAttributeNamesRequest(
                 meta=RequestMeta(
                     project_ids=[1, 2, 3],
@@ -238,20 +199,16 @@ def test_with_page_token(self) -> None:
                         seconds=int((BASE_TIME + timedelta(days=1)).timestamp())
                     ),
                 ),
-                limit=limit,
+                limit=at_a_time,
                 type=AttributeKey.Type.TYPE_STRING,
                 value_substring_match="",
                 page_token=page_token,
             )
             res = EndpointTraceItemAttributeNames().execute(req)
             page_token = res.page_token
-            reslen = len(res.attributes)
-            if reslen == 0:
-                # we are done, we got everything
-                break
-            else:
-                assert res.attributes == expected_attributes[:reslen]
-                expected_attributes = expected_attributes[reslen:]
+            assert res.attributes == expected_attributes[:at_a_time]
+            expected_attributes = expected_attributes[at_a_time:]
+            done += at_a_time
         assert expected_attributes == []
 
     def test_page_token_offset_filter(self) -> None: