adding proxy from environment and tls config to token request for TMC SM

[warroyo]

fixes for tmc sm proxy and tls config

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 17.53%. Comparing base (3578fd2) to head (9668cb8).
⚠️ Report is 140 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/authctx/selfmanaged.go	0.00%	8 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (3578fd2) and HEAD (9668cb8). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (3578fd2)	HEAD (9668cb8)
	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #608      +/-   ##
==========================================
- Coverage   25.23%   17.53%   -7.71%     
==========================================
  Files         195      264      +69     
  Lines       16908    17668     +760     
==========================================
- Hits         4267     3098    -1169     
- Misses      12423    14372    +1949     
+ Partials      218      198      -20     

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[github-actions]

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