🌱 Allow incremental condition patch

[fabriziopandini]

What this PR does / why we need it:
This PR allows incremental condition patching within the same controller.

In order to do so, in the final defer patch, it is required to declare the list of conditions the controller owns, and for which, a conflict between after and latest value of the condition should not generate errors (after value should always be used instead)

Which issue(s) this PR fixes:
Fixes #3260

/assign @vincepri
/assign @gab-satchi

[fabriziopandini]

As a reminder pull-cluster-api-apidiff output

sigs.k8s.io/cluster-api/util/patch
  Incompatible changes:
  - HelperOptions: old is comparable, new is not
  Compatible changes:
  - HelperOptions.OwnedConditions: added
  - WithOwnedConditions: added

sigs.k8s.io/cluster-api/util/conditions
  Incompatible changes:
  - Patch.Apply: changed from func(Setter) error to func(Setter, ...ApplyOption) error
  - PatchOperation.Base: removed
  - PatchOperation.Target: removed
  Compatible changes:
  - ApplyOption: added
  - PatchOperation.After: added
  - PatchOperation.Before: added
  - WithOwnedConditions: added

Above changes are ok because those methods where not part of a release (they were included in v0.3.7 alpha 0, but this is fine)

[vincepri]

/milestone v0.3.7

[vincepri]

/lgtm
/assign @detiber

[vincepri]

/assign @ncdc

for final approval

[gab-satchi]

Thanks for the changes. just minor nits

[fabriziopandini]

@gab-satchi comment addressed, PTAL

[k8s-ci-robot]

@fabriziopandini: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-cluster-api-apidiff	2fb80bf	link	/test pull-cluster-api-apidiff

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[gab-satchi]

/lgtm

[vincepri]

/approve

[k8s-ci-robot]

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This pull-request has been approved by: vincepri

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