[COST-5299] clear cache when table is dropped by migration

[maskarb]

Jira Ticket

COST-5299

Description

This change will delete cache values when we drop tables via trino migration.

Testing

1. clear db:

$ make delete-test-customer-data; make delete-testing; make delete-trino-data; make delete-redis-cache

2. check redis cache for key:

(key this shell open)
$ docker exec -it masu_server sh
$ python koku/manage.py shell
>>> from koku.cache import build_trino_table_exists_key
>>> from koku.cache import is_key_in_cache
>>> key = build_trino_table_exists_key('org1234567', 'openshift_namespace_labels_line_items')
>>> is_key_in_cache(key)
False

3. create customer; ingest OCP on prem:

$ make create-test-customer; make load-test-customer-data test_source=ONPREM 

4. check redis cache for key:

>>> is_key_in_cache(key)
True

5. run trino migration:

(in another shell)
$ docker exec -it masu_server sh
$ python koku/manage.py migrate_trino_tables --drop-tables openshift_namespace_labels_line_items
...
[2024-07-18 16:19:03,370] INFO None 40583 Running against the following schemas: org1234567
[2024-07-18 16:19:03,370] INFO None 40583 Dropping tables ['openshift_namespace_labels_line_items'] for org1234567 (1 / 1)
[2024-07-18 16:19:03,370] INFO None 40583     org1234567: Dropping table openshift_namespace_labels_line_items
[2024-07-18 16:19:03,394] INFO None 40583     org1234567: DROP TABLE result: []
[2024-07-18 16:19:03,401] INFO None 40583     org1234567: delete cache key table-exists-trino-org1234567-openshift_namespace_labels_line_items: True

if the key does not exist in cache, we log False:

[2024-07-18 16:38:04,322] INFO None 1764     org1234567: delete cache key table-exists-trino-org1234567-openshift_namespace_labels_line_items: False

6. check cache for key:

>>> is_key_in_cache(key)
False

Release Notes

• proposed release note

* [[COST-5299](https://issues.redhat.com/browse/COST-5299)] clear cache when table is dropped by migration

[maskarb]

/retest

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.1%. Comparing base (ef60c15) to head (44b332a).

Additional details and impacted files

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##            main   #5221     +/-   ##
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- Coverage   94.1%   94.1%   -0.0%     
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  Files        373     373             
  Lines      31037   31040      +3     
  Branches    4564    4564             
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+ Hits       29212   29213      +1     
- Misses      1162    1165      +3     
+ Partials     663     662      -1