[enhancement] Set `DACommitment` version byte based via onchain version

[ethenotethan]

Currently we hard set the cert version that's prefix encoded in the returned DA commitment bytes to coretypes.VersionThree. To enable >=v4 cert migrations we'll need to update this to be set using the byte value returned from the certVersion method on the EigenDACertVerifier contract.

Also worth noting that the cert version returned from the verifier or coretypes will need to be decremented to reflect the existing version namespace defined for Proxy; ie the following bijective mapping:

• v3 cert version -> 0x2 cert byte
• v4 cert version -> 0x3 cert byte
• v_n cert version -> 0xn-1 cert byte