http: deprecate CRLF constant from _http_common

[karan-lrn]

The CRLF constant exported from '_http_common' is deprecated (DEP0206). Users should use the string '\r\n' directly instead.

This addresses the TODO comment added in #40101.

PR-URL: #62464

[nodejs-github-bot]

Review requested:

• @nodejs/http
• @nodejs/net
• @nodejs/userland-migrations

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.71%. Comparing base (7d1f1b4) to head (ef880b8).

Additional details and impacted files

@@ Coverage Diff @@## main #62464 +/- ##
==========================================
+ Coverage 89.70% 89.71% +0.01% 
==========================================
Files 678 678 Lines 207260 207280 +20 Branches 39749 39749 ==========================================
+ Hits 185917 185963 +46 + Misses 13443 13427 -16 + Partials 7900 7890 -10 

Files with missing lines	Coverage Δ
lib/_http_common.js	100.00% <100.00%> (ø)

... and 31 files with indirect coverage changes

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[jasnell]

I really don't see what purpose this serves.

[karan-lrn]

You're right - this doesn't provide much value. The CRLF constant is trivial and
_http_common is already an internal module. I'll close this PR.

Thanks for the review!