op-challenger: Migrate config over to supporting multiple L2s

[ajsutton]

Description

Updates the op-challenger config and flags to support multiple L2 endpoints and network/configs.

It currently enforces that if single chain game types are active, then only one L2 config/endpoint can be specified. I don't think we'll need to support running a challenger that works for both single chain and interop chain games in the same DisputeGameFactory but if we do we can work out how to rationalise things then.

Tests

Updated unit tests.

Additional context

Builds on #13810

[codecov]

Codecov Report

Attention: Patch coverage is 16.90141% with 118 lines in your changes missing coverage. Please review.

Project coverage is 42.66%. Comparing base (139a0a9) to head (562d910).

Files with missing lines	Patch %	Lines
op-challenger/flags/flags.go	4.61%	62 Missing ⚠️
op-dispute-mon/flags/flags.go	0.00%	27 Missing ⚠️
op-challenger/game/fault/trace/vm/executor.go	43.75%	9 Missing ⚠️
op-challenger/flags/vm_flag.go	0.00%	6 Missing ⚠️
...lenger/game/fault/trace/vm/kona_server_executor.go	25.00%	3 Missing and 3 partials ⚠️
op-challenger/game/fault/clients.go	0.00%	5 Missing ⚠️
.../game/fault/trace/vm/kona_super_server_executor.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                       @@
##           aj/challenger-lazy-clients   #13833      +/-   ##
==============================================================
- Coverage                       42.69%   42.66%   -0.04%     
==============================================================
  Files                             802      802              
  Lines                           71379    71417      +38     
==============================================================
- Hits                            30478    30470       -8     
- Misses                          38237    38284      +47     
+ Partials                         2664     2663       -1     

Files with missing lines	Coverage Δ
op-challenger/config/config.go	93.91% <100.00%> (ø)
.../game/fault/trace/vm/op_program_server_executor.go	100.00% <100.00%> (ø)
.../game/fault/trace/vm/kona_super_server_executor.go	0.00% <0.00%> (ø)
op-challenger/game/fault/clients.go	0.00% <0.00%> (ø)
op-challenger/flags/vm_flag.go	45.45% <0.00%> (-7.18%)	⬇️
...lenger/game/fault/trace/vm/kona_server_executor.go	61.11% <25.00%> (-5.56%)	⬇️
op-challenger/game/fault/trace/vm/executor.go	58.55% <43.75%> (+2.52%)	⬆️
op-dispute-mon/flags/flags.go	9.41% <0.00%> (-4.15%)	⬇️
op-challenger/flags/flags.go	10.63% <4.61%> (-0.17%)	⬇️

... and 9 files with indirect coverage changes