Bump github.com/google/go-containerregistry in /test/new-e2e

Bumps [github.com/google/go-containerregistry](https://github.com/google/go-containerregistry) from 0.20.7 to 0.21.0.
- [Release notes](https://github.com/google/go-containerregistry/releases)
- [Commits](google/go-containerregistry@v0.20.7...v0.21.0)

---
updated-dependencies:
- dependency-name: github.com/google/go-containerregistry
  dependency-version: 0.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

test/new-e2e/go.mod

@@ -1,6 +1,6 @@
 module github.com/DataDog/datadog-agent/test/new-e2e
 
-go 1.25.0
+go 1.25.6
 
 // Do not upgrade Pulumi plugins to versions different from `test-infra-definitions`.
 // The plugin versions NEED to be aligned.
@@ -24,7 +24,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/ssm v1.67.7 // indirect
 	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
 	github.com/cenkalti/backoff/v5 v5.0.3
-	github.com/docker/cli v29.2.0+incompatible // indirect
+	github.com/docker/cli v29.2.1+incompatible // indirect
 	github.com/docker/docker v28.5.2+incompatible // indirect
 	github.com/fatih/color v1.18.0
 	github.com/google/uuid v1.6.0
@@ -227,7 +227,7 @@ require (
 	github.com/digitalocean/go-libvirt v0.0.0-20240812180835-9c6c0a310c6c
 	github.com/go-jose/go-jose/v4 v4.1.3
 	github.com/go-viper/mapstructure/v2 v2.5.0
-	github.com/google/go-containerregistry v0.20.7
+	github.com/google/go-containerregistry v0.21.2
 	github.com/hairyhenderson/go-codeowners v0.7.0
 )
 
@@ -283,7 +283,7 @@ require (
 	github.com/clipperhouse/uax29/v2 v2.2.0 // indirect
 	github.com/containerd/errdefs v1.0.0 // indirect
 	github.com/containerd/errdefs/pkg v0.3.0 // indirect
-	github.com/containerd/stargz-snapshotter/estargz v0.18.1 // indirect
+	github.com/containerd/stargz-snapshotter/estargz v0.18.2 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
 	github.com/dave/dst v0.27.3 // indirect
 	github.com/docker/distribution v2.8.3+incompatible // indirect