fix: ban emitFile via absolute paths on Windows OS

[SASUKE40]

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

The use of absolute paths to generate files via this.emitFile is allowed on Windows OS, which is inconsistent with other OS.

[codecov]

Codecov Report

Merging #3509 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3509   +/-   ##
=======================================
  Coverage   96.12%   96.12%           
=======================================
  Files         176      176           
  Lines        5984     5984           
  Branches     1762     1762           
=======================================
  Hits         5752     5752           
  Misses        118      118           
  Partials      114      114           

Impacted Files	Coverage Δ
src/utils/relativeId.ts	100.00% <ø> (ø)

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[lukastaegert]

Looks great, thanks a lot!