add permission api

[wy65701436]

The permission api targets to return the full set of permissons for robot to use. And only system and project admin have the access

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 #19543 (6eacb53) into main (da949bf) will decrease coverage by 3.14%.
The diff coverage is 3.61%.

@@            Coverage Diff             @@
##             main   #19543      +/-   ##
==========================================
- Coverage   70.64%   67.51%   -3.14%     
==========================================
  Files         745      989     +244     
  Lines       95438   109034   +13596     
  Branches        0     2737    +2737     
==========================================
+ Hits        67419    73609    +6190     
- Misses      24353    31457    +7104     
- Partials     3666     3968     +302     

Flag	Coverage Δ
unittests	67.51% <3.61%> (-3.14%)	⬇️

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

Files	Coverage Δ
src/server/v2.0/handler/handler.go	0.00% <0.00%> (ø)
src/pkg/cached/project/redis/manager.go	55.69% <0.00%> (-1.45%)	⬇️
src/pkg/project/manager.go	5.26% <0.00%> (-0.30%)	⬇️
src/controller/member/controller.go	21.15% <50.00%> (+1.15%)	⬆️
src/pkg/project/dao/dao.go	63.77% <0.00%> (-7.28%)	⬇️
src/server/v2.0/handler/permissions.go	0.00% <0.00%> (ø)

... and 249 files with indirect coverage changes

[chlins]

lgtm