Activate more recent forks in oapi spec tests

[nflaig]

We should activate more recent forks in oapi spec tests after merging electra branch to unstable

lodestar/packages/api/test/unit/beacon/oapiSpec.test.ts

Line 32 in c23d70c

const config = createChainForkConfig({...defaultChainConfig, ALTAIR_FORK_EPOCH: 1, BELLATRIX_FORK_EPOCH: 2});

While this is not critical it gives us better and more relevant test coverage. I have tried this in the past but there were issues in the beacon api spec (like wrong schemas) which should be resolved on the next release.

Same can be done for builder spec as well (although same issue with spec schemas).

Updates required for this are

• schedule most recent fork in config (as fork is determined by slot in data)
• update test data to use default values of most recent fork