Improve repo_read_only header on the UI

[AllForNothing]

1. Fixes The Read_only header on Harbor UI should be visible for every user #18694
2. Now non-system-admin users can also see the repo_read_only header
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Comprehensive Summary of your change

Issue being fixed

Fixes #(issue)

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• Well Written Title and Summary of the PR
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[codecov]

Codecov Report

Merging #18729 (0648cea) into main (43c6586) will decrease coverage by 0.01%.
The diff coverage is 82.35%.

@@            Coverage Diff             @@
##             main   #18729      +/-   ##
==========================================
- Coverage   67.37%   67.37%   -0.01%     
==========================================
  Files         980      980              
  Lines      106749   106739      -10     
  Branches     2668     2665       -3     
==========================================
- Hits        71927    71918       -9     
- Misses      30958    30960       +2     
+ Partials     3864     3861       -3     

Flag	Coverage Δ
unittests	67.37% <82.35%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...ide-nav/config/system/system-settings.component.ts	53.06% <ø> (+3.06%)	⬆️
...shared/components/navigator/navigator.component.ts	32.00% <ø> (+0.83%)	⬆️
.../shared/router-guard/auth-user-activate.service.ts	22.22% <ø> (+2.22%)	⬆️
...src/app/shared/services/message-handler.service.ts	18.91% <ø> (-3.59%)	⬇️
...count-settings/account-settings-modal.component.ts	73.93% <76.92%> (-0.14%)	⬇️
...ell/app-level-alerts/app-level-alerts.component.ts	53.73% <100.00%> (+3.00%)	⬆️

... and 10 files with indirect coverage changes

[wy65701436]

lgtm