[Enhancement] Add config editing and experimental flag enabler for OSD integ-test workflow

[peterzhuamazon]

We want to add these two features to OSD integTest:

1. Add config editing for the OSD bundle per component:
   OSD already have this feature just need to add in test manifest:
   https://github.com/opensearch-project/opensearch-build/blob/main/manifests/2.6.0/opensearch-2.6.0-test.yml#L66
   https://github.com/opensearch-project/opensearch-build/blob/main/src/test_workflow/integ_test/service_opensearch_dashboards.py#L84

2. Add enabler for these env var to enable certain tests:
   https://github.com/opensearch-project/opensearch-dashboards-functional-test/blob/main/cypress.json

Thanks.

[gaiksaya]

[Triage] Hi @peterzhuamazon ,

For point 2, does it depend on plugin configuration?
If not functional test also follows branching strategy and can accordingly make changes to that branch for that particular release

For point 1, we are adding back all the components in the manifest as part of #2144 and then the feature can be added.