[Rails][GDK]Configure self-init OpenBao in GDK for secrets manager testing

To run e2e tests in GDK we need to self-initialize Openbao in GDK. This work is being done in this MR gitlab-development-kit!5340 (merged). Once this MR is merged we should have the initial data inside Openbao to get the tests executed without issues.

The current draft MR:!206291

In the pipeline, the tests on GDK fails since there is no SecretManagerJWT, auth_mount and policies inside Openbao, which will be solved from the self-init Openbao in GDK MR.

Add a graphpQL resolver endpoint to check the status of Openbao