Disable some rules for crd schema check

[cescgina]

NoFieldRemoval and NoNewRequiredFields need to be temporarily disabled
since we're currently building the crds as we go.
ConditionsMustHaveProperSSATags and ListsMustHaveSSATags are disabled
beacuse they affect the Conditions type defined in lib-common, so they
are not specific to watcher-operator.

[amoralej]

/approve
I'm not sure how practical this job will be in future, but at this point I think the best we can do is to add those exceptions and remove them once we are at a more stable development phase

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[SeanMooney]

thanks, we discussed this and agreed that while we are creating the initial crds and we have not released we want to have less strict crd checking as we are not providing a stable API currently.

for now we will disable the problematic rule and review this again as the CRDs stablise