Consolidate logic in populateMap for search indexers

• Type: Story
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 7.1.10 DXP FP10, 7.1.10.2 SP2, 7.1.3 CE GA4, Master
• Component/s: Search Infrastructure
• Labels:
  • liferay-dxp-71-sp2
  • liferay-fixpack-dxp-10-7110

I saw a lot of repeated code.

https://github.com/brianchandotcom/liferay-portal-ee/pull/23700

made me make

https://github.com/liferay/liferay-portal/commit/03a34bf5346958d8d6ada6f3123849cac92c3ee0

and

https://github.com/liferay/liferay-portal/commit/4576487848ce35ac48b8dc8af060c15f52640ef7