Fix execution layer redundancy

[iamit-singh]

Issue Addressed

#3307

Proposed Changes

renamed and changed types(from Vec to Option) of below fields of Config struct:
execution_endpoints: Vec => execution_endpoint: Option
secret_files: Vec => secret_file: Option

Additional Info

[realbigsean]

Thanks for the contribution! It's a nice cleanup, just had one small suggestion

Whoops, looks like CI is failing

[realbigsean]

Looks like some tests need updating as well, if you want to check locally whether tests compile make lint will also check them

[iamit-singh]

@realbigsean thanks for review. Actually I ran make lint in my local, strangely it doesn't give any error. Anyways, I see the errors in here, I'll work on them.

[realbigsean]

@realbigsean thanks for review. Actually I ran make lint in my local, strangely it doesn't give any error. Anyways, I see the errors in here, I'll work on them.

ah there must be some tests are are missed. usually i also run make test-beacon-chain and that seems to cover the rest

[iamit-singh]

@realbigsean fixed the tests!

[realbigsean]

Awesome!

[realbigsean]

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[realbigsean]

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[michaelsproul]

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The pull request has been merged automatically at 62e4abf