Empty the wpr_rocket_cache table after a domain migration

[alfonso100]

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Describe the bug
When a site changes the domain, for example when moving from Staging to Production, the wpr_rocket_cache table will carry entries referencing the old domain. Attempting to preload these URLs add extra CPU usage

Deactivating/reactivating the Preload option won't clear these URLs

To Reproduce
Steps to reproduce the behavior:

1. Stagecoach a website with Preload enabled. Doesn't matter if WP Rocket is active or not
2. Disable, Enable the preload, and check the wpr_rocket_cache table again. It will contain the old ULRs
3. Start browsing some URLs, these will be added to the cache table
4. See the cache table containing Old and New URLs

Expected behavior
After a domain change, the wpr_rocket_cache table should be cleared.

Screenshots

Backlog Grooming (for WP Media dev team use only)

• Reproduce the problem
• Identify the root cause
• Scope a solution
• Estimate the effort

[piotrbak]

The AC:
When clicking on the banner from the notice we should:

1. Purge the cache table, purge the RUCSS table, purge the OCI table
2. Schedule the sitemap/homepage link fetching for the preload (if enabled)
3. Schedule the prewarmup for the OCI (if enabled and it's dependent on the 3.16.1, since the process will be async)

[Tabrisrp]

Scope a solution ✅

• Purging the RUCSS & OCI tables are already handled

Engine\Preload\Admin\Settings

• Add new dependencies CacheTable and LoadInitialSitemap
• Add a new method clear_and_preload() that will truncate the cache table, and initiate the sitemap/homepage preload if the preload option is enabled

Engine\Preload\Admin\Subscriber

• Update the callback on rocket_domain_options_changed to the new method clear_and_preload()

Engine\Preload\Database\Tables\Cache

• Add a method to check if the table exists, and truncate it

Engine\Media\AboveTheFold\Warmup\Subscriber

• Add callback warm_up on rocket_domain_options_changed

Estimate the effort ✅

Effort S