Better logic to populate metadata.component.components

[prabhu]

The logic to populate parentSubComponents needs to be refactored since the dependency tree generated for large monorepos has dangling parents. With 9.2.x, we throw warnings in DEBUG_MODE for missing refs to address these over time.

Example warning:

===== WARNINGS =====
[
  'Version is missing for metadata.component with ref pkg:application/struts-6.1.2.1'
]
===== WARNINGS =====
[
  'Invalid ref in dependencies pkg:maven/org.apache.struts/struts2-plugins@6.1.2.1?type=pom',
  'Invalid ref in dependencies pkg:maven/org.apache.struts/struts2-osgi-bundles@6.1.2.1?type=pom',
  'Invalid ref in dependencies pkg:maven/org.apache.struts/struts2-assembly@6.1.2.1?type=pom',
  'Invalid ref in dependencies pkg:maven/org.apache.struts/struts2-apps@6.1.2.1?type=pom'
]