Add extraLabels to both subcontroller and vbsc pods

[jdoupe]

Fixes #736

By adding the following:
vitessbackupschedules.spec.extraLabels
vitessbackupstorages.spec.extraLabels
vitessclusters.spec.backup.extraLabels

For vtbackup(-init), the code has just been modified to pass along the existing extraLabels on the tabletPool.

@mattlord / @frouioui

[mattlord]

@jdoupe can you please create a quick issue that describes what problem you're trying to solve? And link it to the PR here. Thanks!

[jdoupe]

Administrative note: (and you're probably already aware) the backup-schedule-test failed previously. I made a blank comment adjustment and force-pushed, and it then passed. I guess some sort of race condition.

[mattlord]

LGTM! Just a couple of tiny nits. Thanks, @jdoupe !

[jdoupe]

Bump @frouioui

[frouioui]

Hi! The operator manifest and the vitess repository will need to be modified given this PR updates the CRDs. A guide on how to do this is available here:

#629 (comment)

[jdoupe]

@frouioui - I wanted to mention that in addition to the steps outlined in #629 (comment)

that it appears that the WATCH_NAMESPACE variable has also been altered (by you ;P ) in the time since, and likely needs to be "watched" on any change, as well as the securityContext that @mattlord added in the recent past.

Don't know if either or both of those are appropriate to add to the source (deploy/deployment.yaml).

I'll also note that kustomize(?) looks like it may have changed a bunch of whitespace things, as well as some other mundane bits.

All in all, this looks relatively straightforward, so do let me know if something else needs a tweak.

Thanks!