Update remaining chunk files to RFC 9260

[philipch07]

Description

Update the remaining chunk files to RFC 9260 with the exception of chunk-reconfig which follows RFC 6525 and requires more updates in association.go.

Requires #427 to be merged first.

Reference issue

Resolves #426.

[codecov]

Codecov Report

❌ Patch coverage is 47.43083% with 133 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.70%. Comparing base (9ee8305) to head (5943c82).
⚠️ Report is 30 commits behind head on main.

Files with missing lines	Patch %	Lines
chunk_heartbeat_ack.go	0.00%	31 Missing ⚠️
chunk_heartbeat.go	0.00%	25 Missing ⚠️
chunk_error.go	55.55%	11 Missing and 5 partials ⚠️
chunk_init_common.go	64.44%	8 Missing and 8 partials ⚠️
chunk_selective_ack.go	62.50%	7 Missing and 8 partials ⚠️
chunk_abort.go	68.75%	7 Missing and 3 partials ⚠️
chunk_init_ack.go	14.28%	5 Missing and 1 partial ⚠️
chunk_payload_data.go	37.50%	3 Missing and 2 partials ⚠️
chunk_cookie_echo.go	33.33%	2 Missing and 2 partials ⚠️
chunk_forward_tsn.go	83.33%	1 Missing and 2 partials ⚠️
... and 1 more

❌ Your patch check has failed because the patch coverage (47.43%) is below the target coverage (70.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #433      +/-   ##
==========================================
- Coverage   83.90%   81.70%   -2.21%     
==========================================
  Files          51       51              
  Lines        3448     3585     +137     
==========================================
+ Hits         2893     2929      +36     
- Misses        416      491      +75     
- Partials      139      165      +26     

Flag	Coverage Δ
go	81.70% <47.43%> (-2.21%)	⬇️

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

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[JoTurk]

i think we should break this into multiple PRs, I'm fine with reviewing it as a single one tho.