Write a Karate/Postman Test to verify that OSGI plugins can be installed and then reloaded

Parent Issue

https://github.com/dotCMS/core/issues/31185

Task

Issue Description:

Given the problem encountered in ticket 31185, where installing an OSGi plugin containing a REST resource caused our Jersey container to become unusable due to a recurring exception, we want to create a Karate or Postman test to ensure stability.

This will help confirm that our container remains stable even after multiple plugin lifecycle operations.

Proposed Objective

Same as Parent Issue

Proposed Priority

Priority 2 - Important

Acceptance Criteria

This test should validate that we can:
1. Install OSGi plugins,
2. Stop them,
3. Restart them, and
4. Verify that the Jersey container remains functional after a few consecutive cycles, properly serving content from other endpoints and maintaining expected behavior.

External Links... Slack Conversations, Support Tickets, Figma Designs, etc.

No response

Assumptions & Initiation Needs

No response

Quality Assurance Notes & Workarounds

No response

Sub-Tasks & Estimates

No response

Parent: #31604

Start with parent issue #31185 and inspect existing Karate or Postman tests in the repository to find the supported entry points for OSGi lifecycle operations and Jersey endpoint checks. The test is done when it installs, stops, and restarts the plugin through several cycles and confirms that unrelated endpoints remain functional after each cycle.