op-service: add support for enable/disable JWT auth per RPC handler route

[nonsense]

Description

This PR is adding support for explicitly specifying authentication per RPC handler route, on top of the default JWT authentication.

Tests

I added TestHandlerAuthentication which tests RPC to the same service via differently setup authentication routes.

Additional context

Metadata

Fixes: #15565

[codecov]

Codecov Report

Attention: Patch coverage is 70.58824% with 5 lines in your changes missing coverage. Please review.

Project coverage is 42.91%. Comparing base (8327047) to head (2c94bca).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
op-service/rpc/handler.go	70.58%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #15566      +/-   ##
===========================================
- Coverage    46.78%   42.91%   -3.87%     
===========================================
  Files         1280     1108     -172     
  Lines       106114    95847   -10267     
===========================================
- Hits         49644    41135    -8509     
+ Misses       52969    51386    -1583     
+ Partials      3501     3326     -175     

Flag	Coverage Δ
cannon-go-tests-32	?
cannon-go-tests-64	?
contracts-bedrock-tests	?

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

Files with missing lines	Coverage Δ
op-service/rpc/handler.go	84.72% <70.58%> (-2.60%)	⬇️

... and 177 files with indirect coverage changes

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