Add test to ensure every table update has corresponding _apply_table_update function

[kevinjqliu]

This PR adds a test in to check that every TableUpdate class has a corresponding _apply_table_update function.

While looking at #864 and #950, I noticed that some TableUpdate classes do not have corresponding _apply_table_update function.
I think we should enforce this in tests so that any future TableUpdate have the necessary _apply_table_update to process the update.

[grihabor]

@kevinjqliu Since these 2 prs #1598#1561 are now in main, I believe you can now rebase and merge this one

[kevinjqliu]

Amazing! @grihabor thanks for the ping, let me rebase this PR

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