1.22 compatibility data

[liggitt]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Adds compatibility test fixtures for 1.22 (copied from HEAD testdata on the v1.22.0 tag), drops fixtures for 1.20

xref https://github.com/kubernetes/kubernetes/tree/master/staging/src/k8s.io/api/testdata#populating-data-for-each-release

NONE

/sig architecture
/assign @dims

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: liggitt

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[liggitt]

/assign @smarterclayton

[pacoxu]

LGTM

[pacoxu]

/lgtm