TRUNK-5466: Add support for visit locations to core domain model

[vimla01]

Description of what I changed

This PR moves visit-location support logic from the EMR API module into openmrs-core.

Key changes include:

• Added a required supportsVisits boolean field to Location, defaulting to false
• Added a Liquibase migration to backfill supportsVisits = true for locations tagged as "Visit Location"
• Added LocationService.getAllLocationsThatSupportVisits
• Added VisitService.isSuitableVisit, isSuitableVisitIgnoringTime
• Added VisitService.ensureActiveVisit and ensureVisit, based on existing EMR API logic

This aligns core behavior with how visit locations are handled in Reference Application and Mirebalais.

Issue I worked on

see https://issues.openmrs.org/browse/TRUNK-5466

Checklist: I completed these to help reviewers :)

• My IDE is configured to follow the code style of this project.

• I have added tests to cover my changes.

• I ran mvn clean package right before creating this pull request.

• All new and existing tests passed.

• My pull request is based on the latest changes of the master branch.

[vimla01]

@djazayeri
Hi! This PR is ready for review.
Please let me know if any changes are needed. Thanks!