Add compatibility test for applyOps

[eerxuan]

Part of #44.

Category: system / replication / commands

Add compatibility test coverage for the applyOps feature.

Note: no test coverage exists yet.

[alinaliBQ]

/take

[github-actions]

@alinaliBQ Sorry, only org members or collaborators can self-assign issues.

[eerxuan]

Comprehensive compatibility tests now exist beyond the smoke test; closing.