CAMEL-23112 - Drop Support for JDK 17

[oscerd]

• Jenkinsfile: remove jdk_17_latest from matrix axis and JDK_FILTER choices, remove JDK 21 excludes on ppc64le/s390x so the new baseline runs on all platforms, move coverage profile to the JDK 21 build, and run Sonar analysis on JDK 21 instead of JDK 17
• Jenkinsfile.deploy: default JDK changed to jdk_21_latest
• Jenkinsfile.jbangtest: default JDK changed to jdk_21_latest

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[davsclaus]

there is some more work in jbang I think

there are some java17 tests in kubernetes plugin (run and export)

the export flag for --java-version description says 17 or 21

[oscerd]

yes, this the beginning. there is the virtual threads side

[Croway]

https://github.com/apache/camel-spring-boot/blob/main/core/camel-spring-boot/pom.xml#L277 this should be removed in camel spring boot, and the java21 (test) folder need to be merged with the java one.

I remember we had something similar in Camel too, but it seems like it was already removed