requestKind is the fully-qualified type of the original API request (for example, v1.Pod or autoscaling.v1.Scale).
If this is specified and differs from the value in "kind", an equivalent match and conversion was performed.
For example, if deployments can be modified via apps/v1 and apps/v1beta1, and a webhook registered a rule of
`apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"]` and `matchPolicy: Equivalent`,
an API request to apps/v1beta1 deployments would be converted and sent to the webhook
with `kind: {group:"apps", version:"v1", kind:"Deployment"}` (matching the rule the webhook registered for),
and `requestKind: {group:"apps", version:"v1beta1", kind:"Deployment"}` (indicating the kind of the original API request).
See documentation for the "matchPolicy" field in the webhook configuration type for more details.