tests: added pg_advisory_xact_lock pgx test

Author: victoraugustolls

internal/endtoend/testdata/pg_advisory_xact_lock/exec.sql renamed to internal/endtoend/testdata/pg_advisory_xact_lock/postgresql/pgx/exec.sql

@@ -0,0 +1,13 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "engine": "postgresql",
+      "driver": "pgx/v4",
+      "name": "querytest",
+      "schema": "query.sql",
+      "queries": ["query.sql", "exec.sql"]
+    }
+  ]
+}

internal/endtoend/testdata/pg_advisory_xact_lock/postgresql/pgx/go/db.go

@@ -0,0 +1,5 @@
+-- name: AdvisoryLockExec :exec
+SELECT pg_advisory_lock($1);
+
+-- name: AdvisoryLockExecRows :execrows
+SELECT pg_advisory_lock($1);