fix(keycloak): updated keycloak tls secret names

General MR

Summary

This MR fixes an issue with keycloak's default values where the wrong secrets are referenced when keycloak is deployed. It also fixes some subtle TLS errors that were encountered with the default values when enabling TLS for keycloak.

Relevant logs/screenshots

Before

❯ k get events -A | grep FailedMount | grep tlskey
keycloak              101s        Warning   FailedMount                  pod/keycloak-upstream-3                                                    MountVolume.SetUp failed for volume "tlskey" : secret "keycloak-tlskey" not found

After

❯ k get events -A | grep FailedMount | grep tlskey

Linked Issue

Closes #2807 (closed)

Upgrade Notices

N/A