Hotfix enterprise2 requirements

pkg/build/cmd/fetchimages.go

@@ -46,6 +46,11 @@ func FetchImages(c *cli.Context) error {
 
 	edition := fmt.Sprintf("-%s", cfg.Edition)
 
+	if cfg.Edition == "enterprise2" {
+		cfg.Archs = []config.Architecture{config.ArchAMD64}
+		cfg.Distribution = []config.Distribution{config.Alpine}
+	}
+
 	err = gcloud.ActivateServiceAccount()
 	if err != nil {
 		return err

pkg/build/config/versions.go

@@ -189,12 +189,9 @@ var Versions = VersionMap{
 			ShouldSave: true,
 			Architectures: []Architecture{
 				ArchAMD64,
-				ArchARM64,
-				ArchARMv7,
 			},
 			Distribution: []Distribution{
 				Alpine,
-				Ubuntu,
 			},
 			PrereleaseBucket: "grafana-prerelease/artifacts/docker",
 		},