[Workspace]Remove workspace name populate after use case selected

[wanglam]

Description

This PR include two changes in workspace use case selector.

1. Remove the workspace name populated logic after use case selected
2. Reduce gaps between use case cards

Screenshot

Testing the changes

• Clone branch code and run yarn osd bootstrap --single-version loose
• Add below configs in config/opensearch_dashboards.yml

savedObjects.permission.enabled: true
workspace.enabled: true
uiSettings:
  overrides:
    'home:useNewHomePage': true
opensearchDashboards.dashboardAdmin.users: ['admin']

• Run yarn start --no-base-path
• Login with admin user and go to workspace create page by bottom left menu
• The use case selector should displayed like screenshot above
• The workspace name should be be populated after use case changed

Changelog

• feat: [Workspace]Remove workspace name populate after use case selected

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.93%. Comparing base (9da5f9b) to head (0957170).
Report is 107 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8484      +/-   ##
==========================================
- Coverage   60.93%   60.93%   -0.01%     
==========================================
  Files        3760     3760              
  Lines       89310    89301       -9     
  Branches    13970    13969       -1     
==========================================
- Hits        54423    54414       -9     
  Misses      31492    31492              
  Partials     3395     3395              

Flag	Coverage Δ
Linux_1	28.90% <ø> (-0.01%)	⬇️
Linux_2	56.30% <ø> (ø)
Linux_3	37.76% <ø> (ø)
Linux_4	29.93% <ø> (ø)
Windows_1	28.92% <ø> (-0.01%)	⬇️
Windows_2	56.25% <ø> (ø)
Windows_3	37.76% <ø> (ø)
Windows_4	29.93% <ø> (ø)

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