test: add UT for gen-disk-skus-map_test

[Zhupku]

This pull request includes changes to the pkg/tool/gen-disk-skus-map.go file to improve code maintainability and the addition of a new test file pkg/tool/gen-disk-skus-map_test.go.

Code maintainability improvements:

• Introduced a new exit function to handle program termination, replacing direct calls to os.Exit with calls to the exit function. (pkg/tool/gen-disk-skus-map.go) [1] [2] [3]

Testing improvements:

• Added a new test file pkg/tool/gen-disk-skus-map_test.go to include a unit test for the main function. This test verifies that the program exits with the expected code. (pkg/tool/gen-disk-skus-map_test.go)<!-- Thanks for sending a pull request! Here are some tips for you:

1. If this is your first time, please read our contributor guidelines: https://git.k8s.io/community/contributors/guide#your-first-contribution and developer guide https://git.k8s.io/community/contributors/devel/development.md#development-guide
2. Please label this pull request according to what type of issue you are addressing, especially if this is a release targeted pull request. For reference on required PR/issue labels, read here:
   https://github.com/kubernetes/community/blob/master/contributors/devel/sig-release/release.md#issue-kind-label
3. Ensure you have added or ran the appropriate tests for your PR: https://github.com/kubernetes/community/blob/master/contributors/devel/sig-testing/testing.md
4. If you want faster PR reviews, read how: https://git.k8s.io/community/contributors/guide/pull-requests.md#best-practices-for-faster-reviews
5. Follow the instructions for writing a release note: https://git.k8s.io/community/contributors/guide/release-notes.md
6. If the PR is unfinished, see how to mark it: https://git.k8s.io/community/contributors/guide/pull-requests.md#marking-unfinished-pull-requests
   -->

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

Release note:

none

[k8s-ci-robot]

Hi @Zhupku. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[andyzhangx]

/ok-to-test

[andyzhangx]

can you squash all commits? thx

[k8s-ci-robot]

@Zhupku: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-azuredisk-csi-driver-e2e-capz	bdd1e59	link	true	/test pull-azuredisk-csi-driver-e2e-capz

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[Zhupku]

/retest

[andyzhangx]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, Zhupku

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [andyzhangx]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment