Full toleration objects support

[trillejs]

Hi,

Last week tolerations keys were added:
https://github.com/fluxcd/flux2/pull/899/files#diff-c5538abd82ea734d20ae2773b15cb061ee18a5c5badc699fbe48a5a5287626baR142

However, this only allows to set tolerations by the key:

 tolerations:
- key: yourKey
  operator: Exists

instead of the full toleration object as specified in the Kubernetes documentation. Such as:

 tolerations:
- key: yourKey
  value: your Value
  effect: yourEffect
  operator: Equal