[PATCH 1 of 3 chg] contrib: run python3+chg tests too in heptapod CI

[Pulkit Goyal]

# HG changeset patch
# User Pulkit Goyal <7895pulkit at gmail.com>
# Date 1607767078 -19800
#      Sat Dec 12 15:27:58 2020 +0530
# Node ID 5179a4bd4fc35890cbfd962e0a8960a2f74720a1
# Parent  e4f6dae01b3bc94b0198722522a13c914ab848cd
# EXP-Topic chg-test
contrib: run python3+chg tests too in heptapod CI

Recent patches made the CI on python3+chg green. Let's enable this before there
are more failures to fix.

Differential Revision: https://phab.mercurial-scm.org/D9569

diff -r e4f6dae01b3b -r 5179a4bd4fc3 contrib/heptapod-ci.yml
--- a/contrib/heptapod-ci.yml	Thu Dec 17 18:08:25 2020 +0100
+++ b/contrib/heptapod-ci.yml	Sat Dec 12 15:27:58 2020 +0530
@@ -114,3 +114,10 @@
     variables:
         RUNTEST_ARGS: "--blacklist /tmp/check-tests.txt --chg"
         TEST_HGMODULEPOLICY: "c"
+
+test-py3-chg:
+    <<: *runtests
+    variables:
+        PYTHON: python3
+        RUNTEST_ARGS: "--blacklist /tmp/check-tests.txt --chg"
+        TEST_HGMODULEPOLICY: "c"