feat: refactoring reth_methods() to return multiple Methods

[leruaa]

Closes #1268

[codecov-commenter]

Codecov Report

Merging #1284 (7930157) into main (3d60a24) will decrease coverage by 0.21%.
The diff coverage is 77.27%.

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@@            Coverage Diff             @@
##             main    #1284      +/-   ##
==========================================
- Coverage   76.39%   76.18%   -0.21%     
==========================================
  Files         343      347       +4     
  Lines       38426    38487      +61     
==========================================
- Hits        29354    29323      -31     
- Misses       9072     9164      +92     

Flag	Coverage Δ
unit-tests	76.18% <77.27%> (-0.21%)	⬇️

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

Impacted Files	Coverage Δ
crates/rpc/rpc-builder/src/lib.rs	71.01% <77.27%> (+2.76%)	⬆️
crates/storage/db/src/abstraction/database.rs	80.00% <0.00%> (-20.00%)	⬇️
crates/storage/db/src/tables/models/blocks.rs	76.54% <0.00%> (-11.12%)	⬇️
...tes/storage/provider/src/providers/state/latest.rs	58.06% <0.00%> (-8.61%)	⬇️
...rates/storage/db/src/implementation/mdbx/cursor.rs	74.64% <0.00%> (-7.18%)	⬇️
crates/transaction-pool/src/test_utils/mock.rs	62.05% <0.00%> (-6.74%)	⬇️
...storage/provider/src/providers/state/historical.rs	91.89% <0.00%> (-1.69%)	⬇️
crates/primitives/src/header.rs	93.18% <0.00%> (-0.98%)	⬇️
crates/net/eth-wire/src/capability.rs	59.43% <0.00%> (-0.95%)	⬇️
crates/storage/provider/src/utils.rs	95.83% <0.00%> (-0.89%)	⬇️
... and 38 more

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[mattsse]

lgtm

[mattsse]

this will always create an EthApi instance even though it might not be used.

It will not register it, if not required.
This is fine and perhaps even comes in handy when we need to returns the EthAPI somehow