WIP: feat: add multi-role assignment support for users

[ruibaby]

What type of PR is this?

/area ui
/kind feature
/milestone 2.20.x

What this PR does / why we need it:

支持为用户分配多个角色。

TODO：

• Console / UC 侧边栏显示多个角色
• 支持在管理端查看用户聚合的角色模板列表，或者在分配时显示所选角色其下的角色模板列表，能够让管理员清楚的知道用户具体权限。

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

WIP

Does this PR introduce a user-facing change?

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[f2c-ci-robot]

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.23%. Comparing base (eff73dc) to head (87546da).
Report is 51 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #7037      +/-   ##
============================================
+ Coverage     56.99%   57.23%   +0.23%     
- Complexity     3999     4007       +8     
============================================
  Files           714      712       -2     
  Lines         24110    24144      +34     
  Branches       1585     1590       +5     
============================================
+ Hits          13742    13819      +77     
+ Misses         9756     9710      -46     
- Partials        612      615       +3     

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