This commit introduces an action, `test_site`, that invokes Helm
tests for all deployed releases using the
`ArmadaTestReleasesOperator` introduced in [1]. This action supports
the ability to invoke Helm tests for a specific release using the
`release` parameter and cleanup resources if the `cleanup` parameter
is set to `true`.
[1] https://review.openstack.org/#/c/603236/
Depends-On: https://review.openstack.org/#/c/603236/
Change-Id: Ib5f38fe4b8a6516ee2afae62774ec84f1d2eb1ad
84921b31d2