Convert run-test bash build scripts to python.

Tests use the build script for two distinct purposes:

 * Some tests generate their source code before completion.
   Keep this code in bash for now and rename it "generate-sources".

 * To customize arguments passed to the default compilation script.
   Since the default compilation script is in python, make this
   a normal python call, and add any customization as arguments.

This speeds up the run-test compilation.  There was small cost to
pay due to the switching from python to bash to python.
This added up for the thousands of run-test compilations that we do.

It also removes the need for argument parser in the default script.
We could also remove the data passing via environment (to-do later).
It moves the definition to more build-system-like look and feel.

Test: The outputs are bit-for-bit identical as before.
Change-Id: Idca4181a4676036f06aae0a8f6eea3a3c30d390e
diff --git a/test/714-invoke-custom-lambda-metafactory/build.py b/test/714-invoke-custom-lambda-metafactory/build.py
new file mode 100644
index 0000000..7563062
--- /dev/null
+++ b/test/714-invoke-custom-lambda-metafactory/build.py
@@ -0,0 +1,18 @@
+#
+# Copyright (C) 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from art_build_rules import build_run_test
+
+build_run_test(use_desugar=False, experimental="method-handles")