gas-limit: default to 36

[iurii-ssv]

Depends on:

• (no longer needed) gas-limit: update default to 36 000 000 ssv-spec#553 (maybe actually we'd want to upgrade ssv-spec lib version later on due to gas-limit: default to 36 #2307 (comment) and leave a TODO for it in this PR instead)
• validator: options refactoring (cleanup) #2308
• (no longer needed) netowkrconfig: use pointer receivers (to avoid lots of copies) #2304 so we can change GetGasLimit36Epoch to be a pointer-receiver

Before merging:

• (will do this in netowkrconfig: use pointer receivers (to avoid lots of copies) #2304) change GetGasLimit36Epoch to be a pointer-receiver (once netowkrconfig: use pointer receivers (to avoid lots of copies) #2304 is merged)
• resolve TODOs
• test on stage

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 51.8%. Comparing base (f556934) to head (d65b26b).
Report is 4 commits behind head on stage.

Files with missing lines	Patch %	Lines
networkconfig/ssv.go	50.0%	2 Missing ⚠️
utils/testutils.go	0.0%	2 Missing ⚠️

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[y0sher]

Honestly I don't like that most changes here are not directly related to the task.

[iurii-ssv]

Honestly I don't like that most changes here are not directly related to the task.

Yeah, most of the changes are the result of me trying to make sense of how validator-options are supposed to work (so I can initialize GasLimit36-related one properly). It doesn't have to be all in a single PR,

@y0sher can we merge the related preliminary refactoring(clean-up) PR - #2308 such that GasLimit36-related diff would look more like this ? This refactoring isn't strictly necessary to merge before this change, but I think it makes sense to to it in this order (rather than trying to fit GasLimit36-related diff with the current code version)