* Used images tag to inject image override to clustetctl object,
the same way the image override is done for cert-manager.
* Using this way, the upstream manifests for cluster components does
not need any customization (IMAGE URL as variable) and can be consumed as is.
* If this approach is approved, then will update the same for other proviers
( CAPO, CAPD, CAPZ, cAPG ) and will get tested.
Change-Id: If920f544d111d94e5b7075d5406ed2f87a5e6929
Closes: #431
00dcad041e