[WIP] [release-1.10] fix(theme): update theme

[christoph-jerolimov]

Description

This is a manual backport of #4896, need to be confimed first on a cluster and by the release-manager.

Update @red-hat-developer-hub/backstage-plugin-theme from 0.14.4 to 0.14.7 to include this changes:

• 4d80582: fix(RHDHBUGS-2291): use &.Mui-selected syntax for MuiBottomNavigationAction to resolve CSS specificity console warning
  • fix(theme): use &.Mui-selected syntax for MuiBottomNavigationAction rhdh-plugins#3065
• bb01e90: Removed the box shadow from the AppBar component
  • fix(theme): remove AppBar box shadow to avoid theming issue rhdh-plugins#3194
• 82cc47d: Fixed the background color of myGroup sidebar submenu in light theme
  • fix: bg-color of myGroup sidebar rhdh-plugins#3091

Which issue(s) does this PR fix

• (Normal) https://redhat.atlassian.net/browse/RHDHBUGS-2291 MUI error in Theme Plugin
• (Normal) https://redhat.atlassian.net/browse/RHDHBUGS-3181 Theme: Setting paper component to mui in theme options causing box-shadow in global header
• (Major) https://redhat.atlassian.net/browse/RHDHBUGS-2089 MyGroups menu has black text on black background

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

[sonarqubecloud]

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 69.60%. Comparing base (63fb98c) to head (2904a0d).

Additional details and impacted files

@@                Coverage Diff                @@
##           release-1.10    #4897       +/-   ##
=================================================
+ Coverage         41.03%   69.60%   +28.57%     
=================================================
  Files               121      111       -10     
  Lines              2220     4702     +2482     
  Branches            539      537        -2     
=================================================
+ Hits                911     3273     +2362     
- Misses             1304     1428      +124     
+ Partials              5        1        -4     

Flag	Coverage Δ
install-dynamic-plugins	92.44% <ø> (?)
rhdh	38.81% <ø> (-2.23%)	⬇️

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[github-actions]

Image was built and published successfully. It is available at:

• quay.io/rhdh-community/rhdh:pr-4897
• quay.io/rhdh-community/rhdh:pr-4897-2904a0d0

[karthikjeeyar]

Verified the PR image:

• My Groups background color is set correctly

• Header doesn't box-shadow doesn't appear when header is positioned above-main-content