CI: Replace stale.yaml with stale GH Actions

[OrlinVasilev]

stale.yaml not supported anymore!
https://github.com/marketplace/actions/close-stale-issues

Signed-off-by: OrlinVasilev ovasilev@vmware.com

Thank you for contributing to Harbor!

Comprehensive Summary of your change

Issue being fixed

Fixes #16698

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 #16699 (4f34ef5) into main (527508f) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #16699      +/-   ##
==========================================
+ Coverage   67.30%   67.32%   +0.02%     
==========================================
  Files         953      953              
  Lines       79044    79044              
  Branches     2331     2331              
==========================================
+ Hits        53197    53217      +20     
+ Misses      22268    22249      -19     
+ Partials     3579     3578       -1     

Flag	Coverage Δ
unittests	67.32% <ø> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
src/portal/src/app/shared/units/shared.utils.ts	33.76% <0.00%> (-2.60%)	⬇️
src/jobservice/worker/cworker/c_worker.go	66.50% <0.00%> (-1.92%)	⬇️
...tegration/tag-retention/tag-retention.component.ts	35.65% <0.00%> (+5.21%)	⬆️
src/lib/cache/helper.go	82.60% <0.00%> (+8.69%)	⬆️
src/common/rbac/system/namespace.go	44.44% <0.00%> (+11.11%)	⬆️
src/core/api/internal.go	53.33% <0.00%> (+13.33%)	⬆️
src/lib/cache/util.go	89.47% <0.00%> (+15.78%)	⬆️
...ortal/src/app/shared/pipes/harbor-datetime.pipe.ts	75.00% <0.00%> (+25.00%)	⬆️

[Vad1mo]

we need that!

[OrlinVasilev]

@tianon @qnetter @wy65701436 please check as well!

[wy65701436]

lgtm