Fix cache clearing when import table is changed

[eileenmcnaughton]

Overview

Fix cache clearing when import table is changed

Before

1. enable Civi-Import
2. Start an import - upload the csv then go back & re-do the csv upload
3. navigate to the import search - as long as caches have not otherwise been cleared the api call failure will be visible in the console

After

The cache is cleared whenever the table is changed, test coverage

Technical Details

We were clearing the cache on create & delete, but not when the table was updated - which meant we could hit errors when the cache was trying to access a now-deleted table

Comments

[civibot]

(Standard links)

• If you are reviewing this pull-request, you may wish to consult the test sites and the Review Standards (long template, short template).

[eileenmcnaughton]

I only thought this was relevant - but we should use the metadata cache here for consistency

[eileenmcnaughton]

@totten should this be merge on pass or do we need to wait a few more days after having group-discussed

[totten]

@eileenmcnaughton Don't have to wait for a few days. I flagged merge ready because there was chance that Coleman was affected/could feedback. But yeah, convo indicated it's OK to merge.

Aside: for the test fail, here's a targetted rerun: https://test.civicrm.org/job/CiviCRM-Manual-Test/47/

[eileenmcnaughton]

@totten ah no - I don't think @colemanw was knowingly affected - I was trying to warn him in case lack-of-this-being-merged cost him a bunch of time if he did hit it

[eileenmcnaughton]

It went stale during that test run - rebased

[eileenmcnaughton]

This is passing so merging as discussion suggests it really is merge-on-pass