rebase: update kubernetes to v1.21.2

Updated kubernetes packages to latest release.
resizefs package has been included into k8s.io/mount-utils
package. updated code to use the same.

Updates: #1968

Signed-off-by: Rakshith R <rar@redhat.com>

vendor/k8s.io/kubernetes/pkg/apis/extensions/BUILD

@@ -1,44 +0,0 @@
-package(default_visibility = ["//visibility:public"])
-
-load(
-    "@io_bazel_rules_go//go:def.bzl",
-    "go_library",
-)
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "doc.go",
-        "register.go",
-        "types.go",
-        "zz_generated.deepcopy.go",
-    ],
-    importpath = "k8s.io/kubernetes/pkg/apis/extensions",
-    deps = [
-        "//pkg/apis/apps:go_default_library",
-        "//pkg/apis/autoscaling:go_default_library",
-        "//pkg/apis/networking:go_default_library",
-        "//pkg/apis/policy:go_default_library",
-        "//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
-        "//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
-    ],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [
-        ":package-srcs",
-        "//pkg/apis/extensions/fuzzer:all-srcs",
-        "//pkg/apis/extensions/install:all-srcs",
-        "//pkg/apis/extensions/v1beta1:all-srcs",
-        "//pkg/apis/extensions/validation:all-srcs",
-    ],
-    tags = ["automanaged"],
-)

vendor/k8s.io/kubernetes/pkg/apis/extensions/OWNERS

@@ -11,7 +11,6 @@ reviewers:
 - caesarxuchao
 - mikedanese
 - liggitt
-- nikhiljindal
 - erictune
 - pmorie
 - sttts
@@ -25,14 +24,11 @@ reviewers:
 - piosz
 - dims
 - errordeveloper
-- madhusudancs
 - rootfs
 - mml
 - resouer
-- mbohlool
 - therc
 - pweil-
 - lukaszo
-- jianhuiz
 labels:
 - sig/apps