EnforceBytecodeVersion fails with "Restricted to JDK 11 yet […] contains […] targeted to JDK 17" (second try)

[basil]

See #582 (comment); the previous fix was not tested properly and did not actually work. I tried for several hours to figure out how to update the Enforcer configuration from a different mojo but failed. Things I tried:

• Looking up the plugin from the model and munging the XML programmatically (did not work, as the MojoExecution object uses a different copy of the XML)
• Trying to configure Enforcer with the enforcer.rules Maven property (did not work, as that property does not support rules that take parameters)
• Trying to munge the XML in the Enforcer MojoExecution programmatically from the validate MojoExecution (could not find a Maven API to do this)

Having run out of options, I decided to skip the enforceBytecodeVersion on the first invocation. I confirmed it works on the second invocation (using the profile activated by the marker file written in the first invocation).

Testing done

Built Jenkins core with -Dmaven.compiler.release=17 and built Text Finder with that core and these changes, after running git clean -fxd.

Before this PR, Enforcer failed on the first invocation. After this PR, the first invocation prints:

[INFO] --- maven-hpi-plugin:3.53-SNAPSHOT:validate (default-validate) @ text-finder ---
[INFO] Created marker file /home/basil/src/jenkinsci/text-finder-plugin/target/java-level/17
[INFO] Setting maven.compiler.release to 17
[INFO] Setting maven.compiler.testRelease to 17
[WARNING] Skipping enforceBytecodeVersion; will run on next invocation.
[INFO] 
[INFO] --- maven-hpi-plugin:3.53-SNAPSHOT:validate-hpi (default-validate-hpi) @ text-finder ---
[INFO] 
[INFO] --- maven-enforcer-plugin:3.4.1:enforce (display-info) @ text-finder ---
[INFO] Rule 0: io.jenkins.tools.incrementals.enforcer.RequireExtensionVersion passed
[INFO] Rule 1: org.apache.maven.enforcer.rules.version.RequireMavenVersion passed
[INFO] Rule 2: org.apache.maven.enforcer.rules.version.RequireJavaVersion passed
[INFO] Rule 3: org.apache.maven.enforcer.rules.dependency.BannedDependencies passed
[INFO] Rule 4: org.apache.maven.enforcer.rules.dependency.RequireUpperBoundDeps passed

and the second invocation prints

[INFO] --- maven-hpi-plugin:3.53-SNAPSHOT:validate (default-validate) @ text-finder ---
[INFO] Created marker file /home/basil/src/jenkinsci/text-finder-plugin/target/java-level/17
[INFO] 
[INFO] --- maven-hpi-plugin:3.53-SNAPSHOT:validate-hpi (default-validate-hpi) @ text-finder ---
[INFO] 
[INFO] --- maven-enforcer-plugin:3.4.1:enforce (display-info) @ text-finder ---
[INFO] Rule 0: io.jenkins.tools.incrementals.enforcer.RequireExtensionVersion passed
[INFO] Rule 1: org.apache.maven.enforcer.rules.version.RequireMavenVersion passed
[INFO] Rule 2: org.apache.maven.enforcer.rules.version.RequireJavaVersion passed
[INFO] Rule 3: org.codehaus.mojo.extraenforcer.dependencies.EnforceBytecodeVersion passed
[INFO] Rule 4: org.apache.maven.enforcer.rules.dependency.BannedDependencies passed
[INFO] Rule 5: org.apache.maven.enforcer.rules.dependency.RequireUpperBoundDeps passed