[QA-2495] add: autogen admin svc account pwd

[thearchitector]

Add tf-generated password to our automated service account health check user.

Supports this charts PR: https://github.com/IndicoDataSolutions/charts/pull/1979

---

Note

Low Risk
Low risk: adds a new random_password and passes it into insights-health-check Helm values; primary risk is a one-time password rotation causing drift or requiring coordinated rollout.

Overview
Adds a new Terraform random_password (ins-svc-admin-password) when insights_enabled is true and wires its value into the insights_values Helm overrides under insights-health-check.user.password.

Applies the same change in both application.tf (AWS) and azure/application.tf so the Insights health check uses an autogenerated service-account password instead of an unset value.

^{Written by Cursor Bugbot for commit 277560c. This will update automatically on new commits. Configure here.}

[emuzykin1]

@ltellesfl - please review when you get a chance

[ltellesfl]

lgtm