Add authenticated access to Onvif devices

[johnsonshih]

What this PR does / why we need it:
refs #250
This PR enables the broker to access Onvif devices with username/password. The broker uses device uuid to look up credential from credential directories and authenticate the device access using the credential found.

The schema of credentials in credential directories is described in project-akri/akri-docs#78

Special notes for your reviewer:

If applicable:

• this PR has an associated PR with documentation in akri-docs
• this PR contains unit tests
• added code adheres to standard Rust formatting (cargo fmt)
• code builds properly (cargo build)
• code is free of common mistakes (cargo clippy)
• all Akri tests succeed (cargo test)
• inline documentation builds (cargo doc)
• all commits pass the DCO bot check by being signed off -- see the failing DCO check for instructions on how to retroactively sign commits

[bfjelds]

is there a docs PR? i see the proposal PR, but i'm wondering about some user docs that explain how to use this.

[johnsonshih]

is there a docs PR? i see the proposal PR, but i'm wondering about some user docs that explain how to use this.

yes, there will be some follow up PRs to update Onvif DH document for newly added uuid filter, optional ip/mac address filter and secret information usage.

[johnsonshih]

is there a docs PR? i see the proposal PR, but i'm wondering about some user docs that explain how to use this.

yes, there will be some follow up PRs to update Onvif DH document for newly added uuid filter, optional ip/mac address filter and secret information usage.

The docs PR for the secret usage: project-akri/akri-docs#90