rebase: update to latest github.com/openshift/api version

Also vendor all dependencies.

Signed-off-by: Niels de Vos <ndevos@ibm.com>

api/vendor/sigs.k8s.io/json/README.md

@@ -0,0 +1,40 @@
+# sigs.k8s.io/json
+
+[![Go Reference](https://pkg.go.dev/badge/sigs.k8s.io/json.svg)](https://pkg.go.dev/sigs.k8s.io/json)
+
+## Introduction
+
+This library is a subproject of [sig-api-machinery](https://github.com/kubernetes/community/tree/master/sig-api-machinery#json).
+It provides case-sensitive, integer-preserving JSON unmarshaling functions based on `encoding/json` `Unmarshal()`.
+
+## Compatibility
+
+The `UnmarshalCaseSensitivePreserveInts()` function behaves like `encoding/json#Unmarshal()` with the following differences:
+
+- JSON object keys are treated case-sensitively.
+  Object keys must exactly match json tag names (for tagged struct fields)
+  or struct field names (for untagged struct fields).
+- JSON integers are unmarshaled into `interface{}` fields as an `int64` instead of a 
+  `float64` when possible, falling back to `float64` on any parse or overflow error.
+- Syntax errors do not return an `encoding/json` `*SyntaxError` error.
+  Instead, they return an error which can be passed to `SyntaxErrorOffset()` to obtain an offset.
+
+## Additional capabilities
+
+The `UnmarshalStrict()` function decodes identically to `UnmarshalCaseSensitivePreserveInts()`,
+and also returns non-fatal strict errors encountered while decoding:
+
+- Duplicate fields encountered
+- Unknown fields encountered
+
+### Community, discussion, contribution, and support
+
+You can reach the maintainers of this project via the 
+[sig-api-machinery mailing list / channels](https://github.com/kubernetes/community/tree/master/sig-api-machinery#contact).
+
+### Code of conduct
+
+Participation in the Kubernetes community is governed by the [Kubernetes Code of Conduct](code-of-conduct.md).
+
+[owners]: https://git.k8s.io/community/contributors/guide/owners.md
+[Creative Commons 4.0]: https://git.k8s.io/website/LICENSE