[Workspace]Restrict at least one data source in workspace creation page

[wanglam]

Description

This PR is for adding required restriction for data source selector in workspace creation page. The create workspace button will be disabled if no data sources assigned. It added a empty prompt message for indicate this behavior when no data source assigned. This PR also removed the populated workspace name.

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
• No workspace name will be populated
• The create workspace button should be disabled until data source assigned
• The empty message in data source selector should like screenshot above

Changelog

• feat: [Workspace]Restrict at least one data source in workspace creation page

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

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.95%. Comparing base (49cca7b) to head (82ba854).
Report is 120 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8461      +/-   ##
==========================================
- Coverage   60.95%   60.95%   -0.01%     
==========================================
  Files        3758     3758              
  Lines       89326    89331       +5     
  Branches    13974    13977       +3     
==========================================
+ Hits        54453    54456       +3     
- Misses      31481    31482       +1     
- Partials     3392     3393       +1     

Flag	Coverage Δ
Linux_1	28.93% <100.00%> (+<0.01%)	⬆️
Linux_2	56.35% <ø> (ø)
Linux_3	37.78% <ø> (ø)
Linux_4	29.95% <ø> (ø)
Windows_1	28.94% <100.00%> (+<0.01%)	⬆️
Windows_2	56.31% <ø> (ø)
Windows_3	37.78% <ø> (ø)
Windows_4	29.95% <ø> (ø)

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