deprecate resource label

[wy65701436]

There is no api is using the DAO, remove it from the source code.

Thank you for contributing to Harbor!

Comprehensive Summary of your change

Issue being fixed

Fixes #(issue)

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[codecov]

Codecov Report

Merging #19349 (cef6193) into main (12ce915) will increase coverage by 0.08%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #19349      +/-   ##
==========================================
+ Coverage   67.37%   67.46%   +0.08%     
==========================================
  Files         993      988       -5     
  Lines      108915   108689     -226     
  Branches     2752     2752              
==========================================
- Hits        73384    73327      -57     
+ Misses      31585    31416     -169     
  Partials     3946     3946              

Flag	Coverage Δ
unittests	67.46% <ø> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
src/common/models/base.go	100.00% <ø> (ø)
src/pkg/label/model/model.go	85.00% <ø> (+7.72%)	⬆️

... and 9 files with indirect coverage changes

[chlins]

lgtm