Fix Fault Tolerance metrics via Micrometer

[jmartisk]

Fixes #12196

[Ladicek]

Is there a test somewhere that verifies the original issue is fixed? That's the only thing I can possibly say, since I don't understand anything metrics :-)

[jmartisk]

AFAIK there are no tests for FT metrics working with SmallRye or with Micrometer right now.
Think we need to come up with a reasonable test suite architecture how to run tests for both, without too much code duplication. Almost reminds me of the times in Quality Engineering and the fun of testing matrices (test all combinations of everything with everything)!
This is definitely something we should think about, but I guess it's beyond this PR.