[4.2] Inject the cache controller factory

[laoneo]

Summary of Changes

Adds a new interface and trait to inject a CacheControllerFactoryInterface. Where possible this is used now in core.

Testing Instructions

Open the back end.

Actual result BEFORE applying this Pull Request

All works.

Expected result AFTER applying this Pull Request

All works.

[brianteeman]

Impossible to test from the instructions provided

[SumCompanyInc]

the backend works after applying the patch?

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[SumCompanyInc]

I have tested this item ✅ successfully on 7205827

if it's just opening the backend, it opened fine for me after applying patch

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[joomdonation]

I have tested this item ✅ successfully on bb90f76

Apply patch, access to random pages from both frontend and backend, with both cache enabled/disabled, nothing is broken.

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[joomdonation]

@SumCompanyInc Could you please re-test this PR ? Thanks.

[laoneo]

RTC

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[laoneo]

No need for a second test as I added only a unit test and made a function protected.

[roland-d]

Thanks everybody