fix(stacks/vcs): StackVCSRepo nested-struct incorrectly marshalling a…

…ttributes

hashicorp/jsonapi and by extension google/jsonapi packages have issues
serializing nested-structs that are not relationship, but attr.
Converting to json struct tag directive for the time being
.

stack.go

@@ -69,10 +69,10 @@ type StackList struct {
 
 // StackVCSRepo represents the version control system repository for a stack.
 type StackVCSRepo struct {
-	Identifier        string `jsonapi:"attr,identifier"`
-	Branch            string `jsonapi:"attr,branch,omitempty"`
-	GHAInstallationID string `jsonapi:"attr,github-app-installation-id,omitempty"`
-	OAuthTokenID      string `jsonapi:"attr,oauth-token-id,omitempty"`
+	Identifier        string `json:"identifier"`
+	Branch            string `json:"branch,omitempty"`
+	GHAInstallationID string `json:"github-app-installation-id,omitempty"`
+	OAuthTokenID      string `json:"oauth-token-id,omitempty"`
 }
 
 // Stack represents a stack.