Closes #5549 Clear cache table on domain change

[Tabrisrp]

Description

Fixes #5549

Documentation

User documentation

• Clear the cache table on domain change
• Trigger the OCI warmup on domain change
• Trigger the sitemap preload on domain change

Technical documentation

• Added a new method to truncate the cache table
• Added a new method to truncate the cache table and start the sitemap preload
• Added a new method callback to trigger the OCI warmup on domain change

Type of change

• Enhancement (non-breaking change which improves an existing functionality).

Checklists

Feature validation

• I validated all the Acceptance Criteria. If possible, provide sreenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote self-explanatory code about what it does.
• I wrote comments to explain why it does it.
• I named variables and functions explicitely.
• I protected entry points against unexpected inputs.
• I did not introduce unecessary complexity.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 6fc1a471	✅ 57.89% (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (6fc1a47)	Report Missing	Report Missing	Report Missing
Head commit (abe9942)	37282	14473	38.82%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#6696)	19	11	57.89%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

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[jeawhanlee]

Aside the comment above, On develop, I can see that we clear the cache table during domain change but it's not truncated, with this PR we truncate the cache table.

I also proactively ran smoke tests on e2e and it passes. @MathieuLamiot do we wait for a test plan from @wp-media/qa-team on this one.

[MathieuLamiot]

@jeawhanlee @Tabrisrp Unless you see something risky in the changes, let's not wait for a specific test plan. Instead we should:

• Perform the "How to reproduce" steps from the original GH issue and ensure the expected behavior is now happening, that there are no errors/warnings and that the preload feature seems to work appropriately on basic use-cases.
• QA team would then be able to perform overall preload Non-regression tests on develop once they are back.

[MathieuLamiot]

Following @jeawhanlee comments on the review, I am moving this back to In Progress so that you can discuss them.

[jeawhanlee]

Working as expected according to AC here