Move sdk provider related files to the provider package (#8178) (#14974)

* Move providers to the provider package

* Fix tgc

* Remove deprecated variable

* Keep ResourceMap in the google package

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/8178.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

google/provider.go

@@ -1,6 +1,6 @@
 // Copyright (c) HashiCorp, Inc.
 // SPDX-License-Identifier: MPL-2.0
-package google
+package provider
 
 import (
 	"context"

google/mtls_util.go renamed to google/provider/mtls_util.go

@@ -1,6 +1,6 @@
 // Copyright (c) HashiCorp, Inc.
 // SPDX-License-Identifier: MPL-2.0
-package google
+package provider
 
 import (
 	"strings"