perf: Use `esbuild-loader` instead of `ts-loader` to improve build times

[traeok]

Proposed changes

• Replaces ts-loader with esbuild-loader to improve build speed
  • improves build times by up to 25%! 😋
  • type-checking is run as a separate process, so when in watch mode you no longer have to wait for tsc to finish before reloading
• Replaces ts-node with tsx as it has fewer direct dependencies and is more performant
• Fixed Pretest and Posttest integration launch scripts

pnpm build

Before	After

Release Notes

Milestone: v3

Changelog:

Types of changes

What types of changes does your code introduce to Zowe Explorer? Put an x in the boxes that apply

• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Updates to Documentation or Tests (if none of the other choices apply)
• [x] None of the above (performance boost, optimizations, etc.)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This checklist will be used as reference for both the contributor and the reviewer

• [x] I have read the CONTRIBUTOR GUIDANCE wiki
• [x] PR title follows Conventional Commits Guidelines
• [x] PR Description is included
• [ ] gif or screenshot is included if visual changes are made
• [x] yarn workspace vscode-extension-for-zowe vscode:prepublish has been executed
• [x] All checks have passed (DCO, Jenkins and Code Coverage)
• [ ] I have added unit test and it is passing
• [ ] I have added integration test and it is passing
• [ ] There is coverage for the code that I have added
• [x] I have tested it manually and there are no regressions found

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.40%. Comparing base (714b23c) to head (9abc969).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## next #2909 +/- ## ======================================= Coverage 93.40% 93.40% ======================================= Files 121 121 Lines 10835 10835 Branches 2309 2232 -77 ======================================= Hits 10120 10120 Misses 713 713 Partials 2 2 ```

:umbrella: View full report in Codecov by Sentry.
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[sonarcloud[bot]]

Quality Gate failed

Failed conditions
4.7% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud