feat: Single query for all workspaces with optional filter (#1537)

* feat: Add single query for all workspaces using a filter

coderd/database/queries/workspaces.sql

@@ -8,8 +8,27 @@ WHERE
 LIMIT
 	1;
 
--- name: GetWorkspacesByOrganizationID :many
-SELECT * FROM workspaces WHERE organization_id = $1 AND deleted = $2;
+-- name: GetWorkspacesWithFilter :many
+SELECT
+    *
+FROM
+    workspaces
+WHERE
+    -- Optionally include deleted workspaces
+	deleted = @deleted
+	-- Filter by organization_id
+	AND CASE
+		WHEN @organization_id :: uuid != '00000000-00000000-00000000-00000000' THEN
+			organization_id = @organization_id
+		ELSE true
+	END
+	-- Filter by owner_id
+	AND CASE
+		  WHEN @owner_id :: uuid != '00000000-00000000-00000000-00000000' THEN
+				owner_id = @owner_id
+		  ELSE true
+	END
+;
 
 -- name: GetWorkspacesByOrganizationIDs :many
 SELECT * FROM workspaces WHERE organization_id = ANY(@ids :: uuid [ ]) AND deleted = @deleted;
@@ -37,15 +56,6 @@ WHERE
 	template_id = $1
 	AND deleted = $2;
 
--- name: GetWorkspacesByOwnerID :many
-SELECT
-	*
-FROM
-	workspaces
-WHERE
-	owner_id = $1
-	AND deleted = $2;
-
 -- name: GetWorkspaceByOwnerIDAndName :one
 SELECT
 	*