This will use k8s.io/apimachinery/pkg/util/json which calls sigs.k8s.io/json to UnmarshalWithCaseSensitivePreserveInts in the fakeclient.

Resolves #3207

NOTE: https://pkg.go.dev/sigs.k8s.io/json#UnmarshalCaseSensitivePreserveInts

UnmarshalCaseSensitivePreserveInts parses the JSON-encoded data and stores the result in the value pointed to by v.

UnmarshalCaseSensitivePreserveInts matches the behavior of encoding/json#Unmarshal, with the following changes:

When unmarshaling into a struct, JSON keys must case-sensitively match json tag names (for tagged struct fields) or struct field names (for untagged struct fields), or they are treated as unknown fields and discarded.

When unmarshaling a number into an interface value, it is unmarshaled as an int64 if the JSON data does not contain a "." character and parses as an integer successfully and does not overflow int64. Otherwise, the number is unmarshaled as a float64.

If a syntax error is returned, it will not be of type encoding/json#SyntaxError, but will be recognizeable by this package's IsSyntaxError() function