Handle multirelease jars as input to jacoco tasks

[zml2008]

Right now, when test coverage tasks are run jacoco doesn't know about multirelease sources, so it detects a mismatch between the executed bytecode and the source in the case of any class file using multirelease variants.

This results in error messages like:

> Task :core:jacocoTestReport
[ant:jacocoReport] Classes in bundle 'core' do not match with execution data. For report generation the same class files must be used as at runtime.
[ant:jacocoReport] Execution data for class org/spongepowered/configurate/objectmapping/RecordFieldDiscoverer$1 does not match.
[ant:jacocoReport] Execution data for class org/spongepowered/configurate/util/UnmodifiableCollections does not match.
[ant:jacocoReport] Execution data for class org/spongepowered/configurate/objectmapping/RecordFieldDiscoverer does not match.

Is it possible to resolve this, and (potentially) run coverage reports for every multirelease variant?