Move cloud metadata packages and kubernetes resources marshaling to internal

Decouples cloud provider metadata packages from kubernetes related code

Signed-off-by: Malte Poll <mp@edgeless.systems>

bootstrapper/cloudprovider/gcp/role_test.go

@@ -1,47 +0,0 @@
-package gcp
-
-import (
-	"testing"
-
-	"github.com/edgelesssys/constellation/bootstrapper/role"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestExtractRole(t *testing.T) {
-	testCases := map[string]struct {
-		metadata map[string]string
-		wantRole role.Role
-	}{
-		"bootstrapper role": {
-			metadata: map[string]string{
-				roleMetadataKey: role.ControlPlane.String(),
-			},
-			wantRole: role.ControlPlane,
-		},
-		"node role": {
-			metadata: map[string]string{
-				roleMetadataKey: role.Worker.String(),
-			},
-			wantRole: role.Worker,
-		},
-		"unknown role": {
-			metadata: map[string]string{
-				roleMetadataKey: "some-unknown-role",
-			},
-			wantRole: role.Unknown,
-		},
-		"no role": {
-			wantRole: role.Unknown,
-		},
-	}
-
-	for name, tc := range testCases {
-		t.Run(name, func(t *testing.T) {
-			assert := assert.New(t)
-
-			role := extractRole(tc.metadata)
-
-			assert.Equal(tc.wantRole, role)
-		})
-	}
-}