Add env variable MINIO_IDENTITY_OPENID_REDIRECT_URI to statefulset (#18949)

Using oidc.redirectUri in the values.yaml only works for the deployment.

When using the statefulset the environment variable
MINIO_IDENTITY_OPENID_REDIRECT_URI is not set. This leads to errors with
oicd providers. For example keycloak throws the error 'invalid
redirect_uri'.

This pull request fixes that.

helm/minio/templates/statefulset.yaml

@@ -181,6 +181,8 @@ spec:
               value: {{ .Values.oidc.scopes }}
             - name: MINIO_IDENTITY_OPENID_COMMENT
               value: {{ .Values.oidc.comment }}
+            - name: MINIO_IDENTITY_OPENID_REDIRECT_URI
+              value: {{ .Values.oidc.redirectUri }}
             - name: MINIO_IDENTITY_OPENID_DISPLAY_NAME
               value: {{ .Values.oidc.displayName }}
             {{- end }}