feat: batch operator id conversions

[0x0aa0]

Adds two view functions to OperatorStateRetriever:

• getBatchOperatorId: batch conversion of operator address to operator id
• getBatchOperatorFromId: batch conversion of operator id to operator address

[jianoaix]

LG

[jianoaix]

These two methods will revert if any of the ID/address doesn't exist?

[ChaoticWalrus]

as written, these methods currently will not revert, but instead return bytes32(0) as the ID of any operator who has never registered, or address(0) for any operatorID that has never been used.

relevant code:
https://github.com/Layr-Labs/eigenlayer-middleware/blob/feat/batch-operatorid-view/src/BLSApkRegistry.sol#L275-L276
https://github.com/Layr-Labs/eigenlayer-middleware/blob/feat/batch-operatorid-view/src/RegistryCoordinator.sol#L796-L804

@jianoaix what would your preferred behavior here be?

[jianoaix]

Yep, that's more desirable! Could we put this in the comment of the function?

[ChaoticWalrus]

Looks fine. Would be good to resolve the thread around reversions + add some documentation, prior to merging.

[jianoaix]

LGTM

[ChaoticWalrus]

LGTM.
FYI, the 2 automated test failures are unreleated to this PR and are getting fixed in a separate PR.