Re-organize load tests

[tkobayas]

Currently load test scripts are placed under drools-ansible-rulebook-integration-main. But create a new sub-module drools-ansible-rulebook-integration-load-tests to focus on load tests. Load test scripts can be more organized and reusable. drools-ansible-rulebook-integration-main will be left as standalone execution playground.

[tkobayas]

Done on https://github.com/tkobayas/drools-ansible-rulebook-integration/tree/reorganize-load-test . Will raise a PR later.

[tkobayas]

Migrated all load tests from drools-ansible-rulebook-integration-main.

TODO:

• Raise a PR from the feature branch reorganize-load-test
• Adjust GHA for load test
• Clean up load test bits in drools-ansible-rulebook-integration-main