automation: add --version argument to build-all-windows-packages

This lets us pass a version string through when building all
Windows packages, just like we can do with the individual commands
which produce installers.

Differential Revision: https://phab.mercurial-scm.org/D6317

contrib/automation/hgautomation/cli.py

@@ -73,7 +73,8 b' def build_windows_wheel(hga: HGAutomatio'
             windows.build_wheel(instance.winrm_client, a, DIST_PATH)
 
 
-def build_all_windows_packages(hga: HGAutomation, aws_region, revision):
+def build_all_windows_packages(hga: HGAutomation, aws_region, revision,
+                               version):
     c = hga.aws_connection(aws_region)
     image = aws.ensure_windows_dev_ami(c)
     DIST_PATH.mkdir(exist_ok=True)
@@ -89,9 +90,11 b' def build_all_windows_packages(hga: HGAu'
             windows.purge_hg(winrm_client)
             windows.build_wheel(winrm_client, arch, DIST_PATH)
             windows.purge_hg(winrm_client)
-            windows.build_inno_installer(winrm_client, arch, DIST_PATH)
+            windows.build_inno_installer(winrm_client, arch, DIST_PATH,
+                                         version=version)
             windows.purge_hg(winrm_client)
-            windows.build_wix_installer(winrm_client, arch, DIST_PATH)
+            windows.build_wix_installer(winrm_client, arch, DIST_PATH,
+                                        version=version)
 
 
 def terminate_ec2_instances(hga: HGAutomation, aws_region):
@@ -149,6 +152,10 b' def get_parser():'
         help='Mercurial revision to build',
         default='.',
     )
+    sp.add_argument(
+        '--version',
+        help='Mercurial version string to use',
+    )
     sp.set_defaults(func=build_all_windows_packages)
 
     sp = subparsers.add_parser(