Prepare the arrival of UBI 10 and do a lot of Spring cleaning

[gsmet]

I wasn't able to test everything as some testing requires sudo for whatever reason so let's see how CI likes it.

This is to prepare the arrival of UBI 10 images: quarkusio/quarkus-images#313. I started by wanting some test coverage for UBI 10 and this is how it ended up :).

I took Quarkus 3.20 as the new base, which allowed to simplify a lot of stuff.

Note that commits are semantic and should be reviewed one by one.

[gsmet]

Hmmm, apparently, given the CI matrix, there are additional CI files that require my attention. I'll have a closer look tomorrow.

[jerboaa]

@gsmet I suggest to talk to @Karm about it and how he feels about dropping support for old releases in the test suite. We still have ancient GraalVM version support in there.

[gsmet]

@Karm I see one test failing:

Error:    DebugSymbolsTest.debugSymbolsQuarkusContainer:356 Timeout 20s was reached. Empty webpage does not contain string: `"name":"Apple"' ==> expected: <true> but was: <false>

I have been trying to start the app locally and AFAICS the content is here when started locally so I'm not sure what is going on.

[Karm]

Hello @gsmet, thank you for visiting us at the Mandrel Integration Testsuite venue :-)

I went over the commits and we do not need these changes at this time except this one:

• 74d0fbe Provide a list of runtimes instead of excluding some

I like that change a lot and we would like to have it and backport it to the branch https://github.com/Karm/mandrel-integration-tests/tree/testing-more-runtime-images that is used to run tests over at https://github.com/quarkusio/quarkus-images
If you don't mind, I would drop your other commits and integrate this one.

[Karm]

Hmm, while testing it I remembered why I did this "such and such is excluded" in the first place.
It was to have a convenient way to print these black squares saying that yes, we know about that runtime, but it was intentionally skipped and why:

The current approach seems to make this cumbersome...

[Karm]

@gsmet Thanks for looking into the TS. At this moment, I would like to close this PR unmerged and if there are mode UBI10 adjustments needed, I'd do those in #386. I do realize the versioning scheme etc. is confusing and we should do a much better job on the README or CONTRIBUTING docs, e.g. for starters explaining what is this TS actually used for and where. The destiny of the 6 commits in this PR is as follows:

GSmet's commit	sha	Comment
Update UBI 10 to 10.1	bc08e2f	Taken into #386
Use UBI 10 for testing as it will soon be the default	e772271	Not yet; would affect too much.
Provide a list of runtimes instead of excluding some	74d0fbe	Taken into #386
Reduce testing to only test supported versions	0a59fde	Nope, we should support Q 3.2.12.SP1+
Modernize test suite as we only support Quarkus 3.20+	9836679	Nope, not yet.
Add additional ignore patterns	12398c6	Processed in #385