fix(typescript-estree): check for relative/root paths in printing file path errors

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes Bug: Excess <tsconfigRootDir>/../../... before parserOptions.project complaints #6289
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

Completely eschews process.cwd() detection (which already wasn't relevant anyway, as tsconfigRootDir defaults to process.cwd()!) in favor of checking whether the tsconfigRootDir against the printed filePath.

This means that the nice `<tsconfigRootDir>/` prefix now only shows up when the tsconfigRootDir is a complete starter for the path. Siblings and distance parents will no longer show up.

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✅ Successfully ran 46 targets

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• Node 14 - nx test ast-spec --coverage=false
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[typescript-eslint]

Thanks for the PR, @JoshuaKGoldberg!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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[codecov]

Codecov Report

Merging #6491 (cc71649) into main (16144d1) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6491      +/-   ##
==========================================
- Coverage   90.66%   90.66%   -0.01%     
==========================================
  Files         374      376       +2     
  Lines       12823    12851      +28     
  Branches     3777     3783       +6     
==========================================
+ Hits        11626    11651      +25     
- Misses        853      856       +3     
  Partials      344      344              

Flag	Coverage Δ
unittest	90.66% <100.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...-estree/src/create-program/createProjectProgram.ts	97.67% <100.00%> (+4.19%)	⬆️
...ript-estree/src/create-program/describeFilePath.ts	100.00% <100.00%> (ø)
...lugin/src/rules/consistent-generic-constructors.ts	90.69% <0.00%> (-4.18%)	⬇️
packages/type-utils/src/containsAllTypesByName.ts	0.00% <0.00%> (ø)
.../eslint-plugin/src/rules/promise-function-async.ts	98.07% <0.00%> (ø)
packages/typescript-estree/src/clear-caches.ts	100.00% <0.00%> (ø)
...pt-estree/src/parseSettings/createParseSettings.ts	91.66% <0.00%> (+0.36%)	⬆️
...ipt-estree/src/parseSettings/resolveProjectList.ts	91.48% <0.00%> (+0.37%)	⬆️