Remove babel-proposal plugins

[sejli]

Description

The OSD team updated the proposal plugins to their transform equivalents in this PR, which broke our builds. Removing proposal plugins, as they are not needed.

Issues Resolved

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9e7923a) 83.46% compared to head (29ae306) 83.54%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #355      +/-   ##
==========================================
+ Coverage   83.46%   83.54%   +0.08%     
==========================================
  Files          32       32              
  Lines         393      395       +2     
  Branches       77       77              
==========================================
+ Hits          328      330       +2     
  Misses         45       45              
  Partials       20       20              

Flag	Coverage Δ
dashboards-search-relevance	83.54% <100.00%> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[noCharger]

LGTM

[noCharger]

@sejli Integ test failed, can you look into? Thanks.

error [email protected]: The engine "node" is incompatible with this module. Expected version ">=18". Got "14.20.1"
error Found incompatible module.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.
ERROR [bootstrap] failed:
ERROR Error: Command failed with exit code 1: /opt/hostedtoolcache/node/14.20.1/x64/lib/node_modules/yarn/bin/yarn.js install --non-interactive
          at makeError (/home/runner/work/dashboards-search-relevance/dashboards-search-relevance/OpenSearch-Dashboards/packages/osd-pm/dist/index.js:26834:11)
          at handlePromise (/home/runner/work/dashboards-search-relevance/dashboards-search-relevance/OpenSearch-Dashboards/packages/osd-pm/dist/index.js:25770:26)
          at processTicksAndRejections (internal/process/task_queues.js:[95](https://github.com/opensearch-project/dashboards-search-relevance/actions/runs/7108606750/job/19352472436?pr=355#step:13:96):5)
          at async installInDir (/home/runner/work/dashboards-search-relevance/dashboards-search-relevance/OpenSearch-Dashboards/packages/osd-pm/dist/index.js:25493:3)
          at async Project.installDependencies (/home/runner/work/dashboards-search-relevance/dashboards-search-relevance/OpenSearch-Dashboards/packages/osd-pm/dist/index.js:15231:5)
          at async Object.run (/home/runner/work/dashboards-search-relevance/dashboards-search-relevance/OpenSearch-Dashboards/packages/osd-pm/dist/index.js:9188:11)
          at async runCommand (/home/runner/work/dashboards-search-relevance/dashboards-search-relevance/OpenSearch-Dashboards/packages/osd-pm/dist/index.js:58240:5)
          at async Object.run (/home/runner/work/dashboards-search-relevance/dashboards-search-relevance/OpenSearch-Dashboards/packages/osd-pm/dist/index.js:278:3)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Error: Process completed with exit code 1.