ANSI escape codes not resolved/removed in o.e.m2e.logback.appender

[kwin]

When a Maven plugin leverages the API https://maven.apache.org/shared/maven-shared-utils/apidocs/org/apache/maven/shared/utils/logging/package-summary.html the error messages contain the ANSI escape codes in the Eclipse error.log

For example:

�[1mValidationViolation: �[mFound orphaned filter entries: includes [regex: /etc/acs-commons/jcr:content, regex: /etc/acs-commons/lists/font-awesome-icons/jcr:content/list, regex: /etc/acs-commons/lists/report-parameter-components/jcr:content/list/default_\d+, regex: /etc/acs-commons/exporters/tag-to-csv-exporter/jcr:content(/.*)?] below root '/etc/acs-commons', validator: �[1mjackrabbit-filter�[m

This is triggered through this plugin https://github.com/apache/jackrabbit-filevault-package-maven-plugin/blob/3187361093da5109058c3cc9529adacae4d3bb6a/src/main/java/org/apache/jackrabbit/filevault/maven/packaging/impl/ValidationMessagePrinter.java#L146.

m2e.logback.appender should either interpret ANSI escape characters or remove them prior emitting plain text.
This was probably introduced with https://bugs.eclipse.org/bugs/show_bug.cgi?id=536402 (ae8412f).

[kwin]

The following method is called from Maven to determine whether ANSI is supported or not: https://github.com/apache/maven-shared-utils/blob/8ea76b5ef2f770cd43f6d5d0e0e56d2c5ac47105/src/main/java/org/apache/maven/shared/utils/logging/MessageUtils.java#L93.

This is called from https://github.com/apache/maven/blob/d4be73bb1ebe89314a683cb3c19230a6029b3c0d/compat/maven-embedder/src/main/java/org/apache/maven/cli/MavenCli.java#L483-L501.

The problem is that the same log message is being emitted twice in m2e:
In the Maven Console (for non-incremental builds, supports Color, https://eclipse.dev/eclipse/news/4.25/platform.html#debug-ansi-support), in the Workspace error log (via m2e.logback.appender). The latter does not support ANSI while the former does.

[kwin]

We probably need to remove ANSI codes in

m2e-core/org.eclipse.m2e.logback/src/org/eclipse/m2e/logback/appender/EclipseLogAppender.java

Line 41 in c0014cc

IStatus status = new Status(severity, BUNDLE_ID, logEvent.getFormattedMessage().strip(), getThrowable(logEvent));