chore(dependabot): bump istio.io/client-go from 1.20.2 to 1.21.2

Bumps [istio.io/client-go](https://github.com/istio/client-go) from 1.20.2 to 1.21.2.
- [Commits](istio/client-go@1.20.2...1.21.2)

---
updated-dependencies:
- dependency-name: istio.io/client-go
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -38,7 +38,7 @@ require (
 	golang.org/x/exp v0.0.0-20231206192017-f3f8817b8deb
 	gopkg.in/yaml.v3 v3.0.1
 	helm.sh/helm/v3 v3.14.4
-	istio.io/client-go v1.20.2
+	istio.io/client-go v1.21.2
 	k8s.io/klog/v2 v2.120.1
 	sigs.k8s.io/controller-runtime v0.17.2
 	sigs.k8s.io/kustomize/api v0.16.0
@@ -371,7 +371,7 @@ require (
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
-	istio.io/api v1.20.2-0.20231213020515-8655fab91d5d // indirect
+	istio.io/api v1.21.1-0.20240404235206-c5bbf8925ab4 // indirect
 	k8s.io/kube-openapi v0.0.0-20231206194836-bf4651e18aa8 // indirect
 	k8s.io/utils v0.0.0-20231127182322-b307cd553661 // indirect
 	oras.land/oras-go v1.2.4 // indirect

go.sum

@@ -2744,10 +2744,10 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-istio.io/api v1.20.2-0.20231213020515-8655fab91d5d h1:Yz1kAzxwyJtzI6FmXiWl95I6KaCKVLXS1leQpv4o/pY=
-istio.io/api v1.20.2-0.20231213020515-8655fab91d5d/go.mod h1:hm1PE/mGdIAsjCDkTIAplP53H7TjO5LUQCiVvF26SVg=
-istio.io/client-go v1.20.2 h1:FL99qw5f5W+QFPHutLpGOoPmoKgLwNFrGCEemAvLm00=
-istio.io/client-go v1.20.2/go.mod h1:mub0nwPDAj98cjns7KYLzbvDk0Fg9rx0k2o+KZ4UIUY=
+istio.io/api v1.21.1-0.20240404235206-c5bbf8925ab4 h1:0UHHbkxkYvDR/O0bTzT5xNLLoj+9YZv8qcAFmcPVisg=
+istio.io/api v1.21.1-0.20240404235206-c5bbf8925ab4/go.mod h1:TFCMUCAHRjxBv1CsIsFCsYHPHi4axVI4vdIzVr8eFjY=
+istio.io/client-go v1.21.2 h1:8uS4hUj7LaK2XRmflJuRGtNsPh64abzE9DjAYUSvlyM=
+istio.io/client-go v1.21.2/go.mod h1:mqwsapfu4b1FG47puY9H8y4+ga1+d+hxfdosNQ1HclY=
 k8s.io/api v0.20.1/go.mod h1:KqwcCVogGxQY3nBlRpwt+wpAMF/KjaCc7RpywacvqUo=
 k8s.io/api v0.20.4/go.mod h1:++lNL1AJMkDymriNniQsWRkMDzRaX2Y/POTUi8yvqYQ=
 k8s.io/api v0.20.6/go.mod h1:X9e8Qag6JV/bL5G6bU8sdVRltWKmdHsFUGS3eVndqE8=