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

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[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%)	⬆️

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[noCharger]

LGTM

[noCharger]

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

error chromedriver@119.0.1: 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.