Stabilize extensionauth

[mx-psi]

Description

Marks extensionauth as 1.x

Link to tracking issue

Fixes #11006

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.50%. Comparing base (69908f4) to head (78b2aad).
Report is 30 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12675      +/-   ##
==========================================
- Coverage   91.66%   91.50%   -0.16%     
==========================================
  Files         479      480       +1     
  Lines       26355    26464     +109     
==========================================
+ Hits        24159    24217      +58     
- Misses       1733     1778      +45     
- Partials      463      469       +6     

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[mx-psi]

cc @open-telemetry/collector-approvers

I intend to merge this next Wednesday if I get enough approvals by then

[songy23]

🎉

[atoulme]

+1

[bogdandrutu]

@mx-psi can you wait a bit on this. I want to do a small draft to show something. I want to see a bit of progress on @jmacd's PR related to limiter.

I am not sure if func (a Authentication) GetHTTPClientAuthenticator should return the extensionauth.HTTPClient or directly resolve http.RoundTripper. The advantage of the later is that we can hide to the consumers of the Authentication config multiple possible implementations, for example in case of #12700 we can return the grpc.DialOption so that we can support the Interceptors version, or the StatsHandler version or the Limiter.

EDIT: Here is what I meant #12702, everything looks nice except the "hacky" way of dealing with the query params.

[mx-psi]

@bogdandrutu I can remove the configauth part of this PR, and only stabilize extensionauth. Would that work for you?

[mx-psi]

We discussed this on the stability meeting from Monday March 24th and agreed to first stabilize extensionauth and leave configauth for after we have decided on #12702. Merging this after removing the configauth bits!