[MCOMPILER-540] useIncrementalCompilation=false may add generated sources to the sources list

**[Daniel Mensinger](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=JIRAUSER281729)** opened **[MCOMPILER-540](https://issues.apache.org/jira/browse/MCOMPILER-540?redirect=false)** and commented

When using the `maven-compiler-plugin` with `false`, source files from the generated sources root directory may be added to the list of source files. This can lead to `javax.annotation.processing.FilerException: Attempt to recreate a file for type XXXX` exceptions.

To reproduce:

Checkout the `annotationProcessingTest` branch of https://github.com/mensinda/quarkus-stuff/tree/annotationProcessingTest and run the `generatedSourcesInJavacArgs.sh` script.

**Note:** The fix in my PR depends on MCOMPILER-538 to fully work.

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**Issue Links:**
- [MCOMPILER-538](https://issues.apache.org/jira/browse/MCOMPILER-538) Do not add target/generated-sources/annotations to the source roots

**Remote Links:**
- [GitHub Pull Request #192
](https://github.com/apache/maven-compiler-plugin/pull/192)