NodeTypesEntryHandler does not consider CND files outside of META-INF/vault/nodetypes.cnd

Namespace and node type definitions can not only be given in /META-INF/vault/nodetypes.cnd but also in other cnd files inside the package (compare with Package property cndPattern, http://jackrabbit.apache.org/filevault/properties.html).
Currently only those in /META-INF/vault/nodetypes.cnd are correctly extracted though: https://github.com/apache/sling-org-apache-sling-feature-cpconverter/blob/acf8c533590b9a081d64ca8e4787bed600f36386/src/main/java/org/apache/sling/feature/cpconverter/handlers/NodeTypesEntryHandler.java#L32 because the pattern being registered in https://github.com/apache/sling-org-apache-sling-feature-cpconverter/blob/acf8c533590b9a081d64ca8e4787bed600f36386/src/main/java/org/apache/sling/feature/cpconverter/ContentPackage2FeatureModelConverter.java#L425 does not start with the jcr_root prefix.

CND patterns in package are matched against absolute repository paths while patterns for AbstractRegexEntryHandler are matched against the ZIP package file path.