[Backport 2.x] Removes Add Integration button

[opensearch-trigger-bot]

Backport f6cbd1d from #2723.

[codecov-commenter]

Codecov Report

Merging #2756 (f6cbd1d) into 2.x (19656d6) will decrease coverage by 0.00%.
The diff coverage is 63.93%.

❗ Current head f6cbd1d differs from pull request most recent head 6954b40. Consider uploading reports for the commit 6954b40 to get more accurate results

@@            Coverage Diff             @@
##              2.x    #2756      +/-   ##
==========================================
- Coverage   66.74%   66.73%   -0.01%     
==========================================
  Files        3210     3210              
  Lines       61266    61272       +6     
  Branches     9360     9370      +10     
==========================================
- Hits        40891    40890       -1     
- Misses      18128    18138      +10     
+ Partials     2247     2244       -3     

Impacted Files	Coverage Δ
...osd-opensearch-archiver/src/lib/docs/test_stubs.ts	68.75% <ø> (ø)
...-opensearch-archiver/src/lib/indices/test_stubs.ts	80.00% <ø> (ø)
...ed_tests_reporter/run_failed_tests_reporter_cli.ts	17.91% <0.00%> (ø)
...tional_test_runner/lib/config/fixtures/config.1.js	100.00% <ø> (ø)
...tional_test_runner/lib/config/fixtures/config.2.js	100.00% <ø> (ø)
..._test_runner/lib/config/fixtures/config.invalid.js	100.00% <ø> (ø)
packages/osd-utils/src/package_json/index.ts	100.00% <ø> (ø)
packages/osd-utils/src/path/index.ts	75.00% <ø> (ø)
src/cli/cluster/cluster_manager.ts	43.68% <ø> (ø)
src/cli_plugin/install/settings.js	100.00% <ø> (ø)
... and 88 more

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