workers: make Worker async disposable

[jasnell]

await using worker = new Worker(...);

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.19%. Comparing base (cf5cbff) to head (102558e).
⚠️ Report is 780 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #58385      +/-   ##
==========================================
- Coverage   90.20%   90.19%   -0.02%     
==========================================
  Files         635      635              
  Lines      187224   187229       +5     
  Branches    36770    36774       +4     
==========================================
- Hits       168889   168862      -27     
- Misses      11088    11124      +36     
+ Partials     7247     7243       -4     

Files with missing lines	Coverage Δ
lib/internal/worker.js	99.82% <100.00%> (+<0.01%)	⬆️

... and 30 files with indirect coverage changes

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[LiviaMedeiros]

LGTM with or without the nit; and s/^workers/worker/ in the commit message.

Noting that the code change can be safely backported to release lines that have Symbol.asyncDispose but not the ERM itself; and splitting this into two commits (one that adds [SymbolAsyncDispose](), tests it by calling explicitly, and documents without code example; and another for v24+ adding using in tests in docs) might make it more straightforward for releasers.

[aduh95]

Why dont-land-on-v22.x PRs that should not land on the v22.x-staging branch and should not be released in v22.x. ? That feels like something we'd want to backport. Could you follow the same approach of #58206, i.e. avoid using the new syntax so this can be backported, and add a TODO to have a follow-up to test with the await using syntax?

[mcollina]

lgtm