Remove Optimism feature from chainspec

[mattsse]

Describe the feature

this is closely related to #7679

we should find a way to get rid of optimism specific stuff in chainspec, either by switching to name based hardforks, or a trait abstraction for chainspec.

in the short term, I think using named variants as described in #7679 would be easier and would allow adding additional hardforks and check functions via extension traits

or we go all the way and add trait for chainspec.

Additional context

No response

Tasks

Beta Give feedback

1. Make reth_chainspec::ChainSpec generic over hard fork #10468
   A-op-reth C-debt +2
   
2. chore(chainspec): move op stack chain specs to reth-optimism-chainspec #10485
   A-op-reth C-debt +2
3. Move OptimismHardfork to reth-optimism-chainspec #10518
   A-op-reth C-debt +2
   
4. Add builder for NodeTypes::ChainSpec #10513
   A-op-reth A-sdk C-debt +3
   
5. chore(op): remove redundant op feature from reth-optimism-consensus #10944
   A-op-reth C-debt +2
6. feat: use new ChainHardforks type on ChainSpec #9065
   C-debt C-enhancement +2
7. Transition to OpChainSpec for Optimism node #11238
   A-sdk +1
8. remove op Genesis conversions from reth-chainspec #11396
   A-op-reth C-debt D-good-first-issue +3
9. cleanup chainspec value parsers #11397
   D-good-first-issue +1
   
10. Add OpChainSpecBuilder type #11561
    A-op-reth C-enhancement D-good-first-issue +3
    

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