internal: Move GCP library to internal/cloud

The internal GCP library was originally placed into `internal/upload`
directory, since its purpose was mainly to upload and import built
images to GCP.

Functionality for other cloud-provider-specific libraries is broader,
however scattered around the `internal/` directory based on purpose (e.g. in
`internal/boot` and `internal/upload`). Since all parts of provider-specific
library usually share some common pieces (e.g. authentication), it makes
sense to consolidate them into a single package (e.g. in
`internal/cloud/<provider>`).

Create `internal/cloud` directory, where all cloud-provider-specific
internal libraries should be consolidated. Start with GCP.

Signed-off-by: Tomas Hozza <thozza@redhat.com>

cmd/osbuild-upload-gcp/main.go

@@ -6,7 +6,7 @@ import (
 	"io/ioutil"
 	"log"
 
-	"github.com/osbuild/osbuild-composer/internal/upload/gcp"
+	"github.com/osbuild/osbuild-composer/internal/cloud/gcp"
 )
 
 type strArrayFlag []string

cmd/osbuild-worker/jobimpl-osbuild.go

@@ -16,13 +16,13 @@ import (
 
 	"github.com/google/uuid"
 
+	"github.com/osbuild/osbuild-composer/internal/cloud/gcp"
 	"github.com/osbuild/osbuild-composer/internal/common"
 	"github.com/osbuild/osbuild-composer/internal/distro"
 	"github.com/osbuild/osbuild-composer/internal/osbuild"
 	"github.com/osbuild/osbuild-composer/internal/target"
 	"github.com/osbuild/osbuild-composer/internal/upload/awsupload"
 	"github.com/osbuild/osbuild-composer/internal/upload/azure"
-	"github.com/osbuild/osbuild-composer/internal/upload/gcp"
 	"github.com/osbuild/osbuild-composer/internal/upload/koji"
 	"github.com/osbuild/osbuild-composer/internal/upload/vmware"
 	"github.com/osbuild/osbuild-composer/internal/worker"