Banner IT improvements after resolving issues on rocky.

[jp-tosca]

What this PR does / why we need it:
After debugging this test and the endpoint to resolve the issues on #10312 I made a few changes:

1. This test was relying heavily on having any of the specified locales in the JSON but with no reason. This dependency was cause due the inability of the API to return the ID of the created banner and the need to search the id by the display message, see this comment. To avoid this, the endpoint api/admin/bannerMessage has been extended so the ID is returned when created, this will allow to delete a specific banner with ID after creation. This is not a breaking change since is not removing anything from the JSON.
2. The method UtilIT.getBannerMessageIdFromResponse is not necessary anymore, it also was hardcoded a return to 0 if the string was not found but the id could be some other number.

Which issue(s) this PR closes:

Closes #10312

Is there a release notes update needed for this change?:
Yes.

[coveralls]

coverage: 20.657% (+0.08%) from 20.574%
when pulling a47329f on rocky_IX
into 5bf6b6d on develop.

[github-actions]

🚫 [reviewdog] <com.puppycrawl.tools.checkstyle.checks.imports.IllegalImportCheck> _{reported by reviewdog 🐶}
Illegal import - org.apache.commons.lang.exception.ExceptionUtils.

[jp-tosca]

With the last changes I updated the endpoint api/admin/bannerMessage this test will still fail if no locale is defined but this time will be at the API level not at the Test level. This endpoint will return a 500 with No banner messages found for this locale. if there is no banner for this locale over an array with empty elements.

[pdurbin]

I took a quick look.

[pdurbin]

The doc change looks good. I left comments on the Makefile.

[pdurbin]

I left another comment on the Makefile.

[jp-tosca]

I had to change the make docs-all and docs-pdf since I didn't noticed these requires sphinx-latexpdf over sphinx. They work fine now.

[github-actions]

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[github-actions]

📦 Pushed preview images as

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🚢 See on GHCR. Use by referencing with full name as printed above, mind the registry name.