[BUG][Opensearch] Special characters in password silently fails the graceful termination handler

[Phenix66]

Describe the bug
The auth handling for the opensearch-master-graceful-termination-handler container is not done in a Bash safe manner. Certain characters, such as !, may get interpreted by Bash and cause the entire curl command to silently fail.

To Reproduce
Steps to reproduce the behavior:

1. Deploy the Opensearch chart with the following non-default values (password value can be anything with ! in it and other characters may break it as well)

masterTerminationFix: true
extraEnvs:
 - name: OPENSEARCH_INITIAL_ADMIN_PASSWORD
   value: ABC123!!def67789

2. Check the logs of the opensearch-master-graceful-termination-handler container
3. Note that they are completely empty. If the curl was successful, there should be log messages as to whether or not that node is the master.

Expected behavior
Log messages for the opensearch-master-graceful-termination-handler containers are present

Chart Name
Opensearch

Screenshots
N/A

Host/Environment

• Helm Version: 3.15.3
• Kubernetes Version: v1.30.0 (minikube)

[Phenix66]

Nevermind, I overlooked how this executed and was expecting logs when there shouldn't have been. After further testing, no issues.