Compress data source selector on management's data sources page

[AMoo-Miki]

I see a 2px height diff which is problem with the DataSourceSelector component.

Changelog

• skip

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.70%. Comparing base (46afb96) to head (e236782).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7329      +/-   ##
==========================================
+ Coverage   67.68%   67.70%   +0.02%     
==========================================
  Files        3521     3521              
  Lines       69777    69777              
  Branches    11390    11390              
==========================================
+ Hits        47232    47246      +14     
+ Misses      19742    19730      -12     
+ Partials     2803     2801       -2     

Flag	Coverage Δ
Linux_1	33.15% <ø> (ø)
Linux_2	55.46% <ø> (ø)
Linux_3	43.25% <ø> (?)
Linux_4	34.81% <ø> (-0.01%)	⬇️
Windows_1	33.17% <ø> (ø)
Windows_2	55.41% <ø> (?)
Windows_3	43.26% <ø> (ø)
Windows_4	34.81% <ø> (+<0.01%)	⬆️

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[ruanyl]

@AMoo-Miki You may need to update the failed snapshot tests

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch-Dashboards/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch-Dashboards/backport-2.x
# Create a new branch
git switch --create backport/backport-7329-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 3526f96f5889227fd79f3e671b3e3507a1a547d1
# Push it to GitHub
git push --set-upstream origin backport/backport-7329-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch-Dashboards/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-7329-to-2.x.