fix: default keycloak realm envs (#455)

## Description
Updating default values for keycloak realm settings, identity-config
realm.json files now use default values in the realm.json so there is no
need for default values to live in uds-core. So removed those default
values and instead added a comment block of values that could be used to
override the default values.

## Related Issue
[Relates to this uds-identity-config
PR](defenseunicorns/uds-identity-config#95)

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Other (security config, docs update, etc)

## Checklist before merging

- [x] Test, docs, adr added or updated as needed
- [x] [Contributor Guide
Steps](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)(https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md#submitting-a-pull-request)
followed

src/keycloak/chart/values.yaml

@@ -15,12 +15,20 @@ domain: "###ZARF_VAR_DOMAIN###"
 # The primary Keycloak realm
 realm: uds
 
-# UDS Identity Config Environment Variables. More info here: https://github.com/defenseunicorns/uds-identity-config/blob/main/docs/CUSTOMIZE.md#templated-realm-values
+# UDS Identity Config Realm Environment Variables. More info here: https://github.com/defenseunicorns/uds-identity-config/blob/main/docs/CUSTOMIZE.md#templated-realm-values
 realmInitEnv:
   GOOGLE_IDP_ENABLED: false
-  # Other UDS Identity Config fields that will be used in the realm.json initalization of keycloak
-  # GOOGLE_IDP_CLIENTID: ""
-  # GOOGLE_IDP_CLIENT_SECRET: ""
+#   GOOGLE_IDP_ID: ""
+#   GOOGLE_IDP_SIGNING_CERT: ""
+#   GOOGLE_IDP_NALE_ID_FORMAT: ""
+#   GOOGLE_IDP_CORE_ENTITY_ID: ""
+#   GOOGLE_IDP_ADMIN_GROUP: ""
+#   GOOGLE_IDP_AUDITOR_GROUP: ""
+#   PASSWORD_POLICY: "hashAlgorithm(pbkdf2-sha256) and forceExpiredPasswordChange(90) and specialChars(2) and lowerCase(0) and upperCase(0) and passwordHistory(5) and length(12) and notUsername(undefined) and digits(0)"
+#   EMAIL_VERIFICATION_ENABLED: true
+#   OTP_ENABLED: true
+#   TERMS_AND_CONDITIONS_ENABLED: true
+#   REALM_X509_OCSP_FAIL_OPEN: true
 
 # Generates an initial password for first admin user - only use if install is headless
 # (i.e. cannot hit keycloak UI with `zarf connect keycloak`), password should be changed after initial login