Investigste TestRunIncrementalBuildRoutine flakiness

[lburgazzoli]

What happened?

The TestRunIncrementalBuildRoutine sometimes fails with no clear explanation

Steps to reproduce

Seen latest time in https://github.com/apache/camel-k/actions/runs/9008778242/job/24765909747?pr=5480

Relevant log output

❌ TestRunIncrementalBuildRoutine (10m24.24s)
      incremental_build_test.go:55: 
          Timed out after 300.000s.
          Expected
              <string>: kind-registry:5000/test-0c69be85-3121-48a6-9228-5e055a1f5b24/camel-k-kit-cou7vd3ia7ns738hnbl0@sha256:ef37351cef1b88365a6c1e9399fa028d03a763ade86ff06d609068552bd5697e
          to equal
              <string>: eclipse-temurin:17

### Camel K version

_No response_

[squakez]

Similar of #5332 - all these parallel builds are suffering some problem lately. I suppose it could be the enabled parallelism introduced in tests are showing possible concurrency problem in the build process.

[squakez]

As you're tracking these kind of failures as well, please, link the action so it is easier to follow it up and get the log dump for a more clear analysis. Thanks!

Seen in https://github.com/apache/camel-k/actions/runs/9008778242/job/24765909747?pr=5480

[valdar]

This might be fixed by #5494