Fix broken Windows CLI tests

[lukastaegert]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

As the Windows pipeline does not run for PRs from forks, some Windows CLI tests are now broken on master. This will fix those tests by introducing a helper that automatically strips escape sequences from the output before matching strings. Also, this will refine the batched warning handler and improve coverage.

Furthermore, this will change CLI warnings with two respects:

• Circular dependency warnings are finally aggregated!
• All non-aggregated warnings are displayed immediately and not after the build.

cc @tjenkinson

[codecov]

Codecov Report

Merging #3249 into master will increase coverage by 1.42%.
The diff coverage is 93.4%.

@@            Coverage Diff             @@
##           master    #3249      +/-   ##
==========================================
+ Coverage   91.31%   92.74%   +1.42%     
==========================================
  Files         170      170              
  Lines        5930     5925       -5     
  Branches     1797     1793       -4     
==========================================
+ Hits         5415     5495      +80     
+ Misses        310      224      -86     
- Partials      205      206       +1

Impacted Files	Coverage Δ
src/utils/collapseSourcemaps.ts	90% <ø> (+0.98%)	⬆️
src/Graph.ts	92.94% <ø> (ø)	⬆️
cli/run/build.ts	82.92% <100%> (+2.43%)	⬆️
cli/run/batchWarnings.ts	94.16% <93.33%> (+65.13%)	⬆️
src/finalisers/shared/warnOnBuiltins.ts	100% <0%> (+28.57%)	⬆️

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