CloudMigrations: Create resource dependency map to validate snapshot request (#102594)

* CloudMigrations: Create resource dependency map to validate snapshot request

* CloudMigrations: Validate resource types dependencies in create snapshot request

* CloudMigrations: Update service interface to pass parsed resource types for creation

* CloudMigrations: Conditionally append resource to snapshot if enabled

* CloudMigrations: Add /cloudmigration/resources/dependencies endpoint

* CloudMigrations: Properly filter dashboards and folders from snapshot

pkg/services/cloudmigration/model.go

@@ -14,6 +14,7 @@ var (
 	ErrMigrationNotDeleted         = errutil.Internal("cloudmigrations.sessionNotDeleted").Errorf("Session not deleted")
 	ErrTokenNotFound               = errutil.NotFound("cloudmigrations.tokenNotFound").Errorf("Token not found")
 	ErrSnapshotNotFound            = errutil.NotFound("cloudmigrations.snapshotNotFound").Errorf("Snapshot not found")
+	ErrEmptyResourceTypes          = errutil.BadRequest("cloudmigrations.emptyResourceTypes").Errorf("Resource types cannot be empty")
 )
 
 // CloudMigration domain structs
@@ -192,6 +193,18 @@ type SnapshotResultQueryParams struct {
 	ErrorsOnly  bool
 }
 
+type ResourceTypes map[MigrateDataType]struct{}
+
+func (r ResourceTypes) Has(t MigrateDataType) bool {
+	_, ok := r[t]
+	return ok
+}
+
+type CreateSnapshotCommand struct {
+	SessionUID    string
+	ResourceTypes ResourceTypes
+}
+
 type GetSnapshotsQuery struct {
 	SnapshotUID string
 	OrgID       int64