Now that we've bumped minBinary to 22.2[1], we should now remove all V22_2* version gates and related gated logic/migrations/etc as applicable.

V22_2 gates for Disaster Recovery[2]:

• V22_2SupportAssumeRoleAuth
• V22_2NoNonMVCCAddSSTable
• V22_2SystemExternalConnectionsTable
• V22_2FixUserfileRelatedDescriptorCorruption

[1] #95530
[2] Using git blame from https://github.com/cockroachdb/cockroach/blame/984c24b05bfe3c04ffd7bec5784d475796504522/pkg/clusterversion/cockroach_versions.go

Jira issue: CRDB-24316