Bundled beachhead services: cert-manager, external-secrets, velero, dex

[BROngineer]

Added:

• cert-manager v1.16.2 service template
• external-secrets v0.11.0 service template
• velero v8.1.0 service template
• dex v0.19.1 service template

Fixes: #736 #737 #738 #739

[DinaBelova]

@wahabmk just to confirm, did you try this PR / tested the service templates?

[wahabmk]

Yes I can see that the serviceTemplates have been installed:

➜  hmc git:(fc1cfae) ~ khmc get servicetemplate
NAME                      VALID
cert-manager-1-16-2       true
dex-0-19-1                true
external-secrets-0-11-0   true
ingress-nginx-4-11-0      true
ingress-nginx-4-11-3      true
kyverno-3-2-6             true
velero-8-1-0              true

[BROngineer]

Draft until testing deployments using added templates completed. Need to figure out whether services are usable with default values, or minimal required configuration. If the minimal required configuration is user-specific (Dex) or requires credentials (Velero) or requires CRDs (cert-manager) then it should be written in docs.

[a13x5]

LGTM

Really nitpicking: CRs at the end of some files are missing (up to author to fix this)

And please squash commits before merging