http2: fix client async storage persistence

[orgads]

Create and store an AsyncResource for each stream, following a similar approach as used in HttpAgent.

Fixes #55376

[nodejs-github-bot]

Review requested:

• @nodejs/http2
• @nodejs/net

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.41%. Comparing base (7bc3e16) to head (a4a029a).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #55460      +/-   ##
==========================================
- Coverage   88.41%   88.41%   -0.01%     
==========================================
  Files         653      653              
  Lines      187435   187444       +9     
  Branches    36077    36075       -2     
==========================================
+ Hits       165714   165720       +6     
+ Misses      14960    14951       -9     
- Partials     6761     6773      +12     

Files with missing lines	Coverage Δ
lib/internal/http2/core.js	95.53% <100.00%> (+0.01%)	⬆️

... and 23 files with indirect coverage changes

[orgads]

I'll try to improve it and use internals instead of AsyncResource.

[orgads]

I didn't find a better solution. Open for suggestions :)

[orgads]

@mcollina Any comments?

[mcollina]

lgtm

However I'm concerned that this will add overhead.

[orgads]

Are headers received only once per stream? If they are, we can unset the resource after using it in onSessionHeaders.

[orgads]

Renamed asyncRes to reqAsync for consistency.