Implement a framework for having common code for release scripts (#55893)

* Implement a framework for having common code for release scripts

* Release scripts will go through hacking/build-ansible.  build-ansible is
  a pluggable script which will set a directory that has common code for
  non-enduser scripts.  It will then invoke the plugin which implements
  that subcommand.  Uses straight.plugin for loading each sub-command.

* We're going to add tools which are needed to test ansible (the changelog
  generation, for instance) so we need to include the pieces relevant to
  that in the tarball.

* Add straight.plugin to the sanity test requirements for the same
  reason

* Skip compile test just for build-ansible plugins which won't be run as
  part of sanity tests.

test/runner/requirements/sanity.txt

@@ -7,6 +7,7 @@ pylint ; python_version >= '3.5' # pylint 2.0.0 and later require python 3+
 pytest
 rstcheck ; python_version >= '2.7' # rstcheck requires python 2.7+
 sphinx
+straight.plugin  # needed for hacking/build-ansible which will host changelog generation
 virtualenv
 voluptuous
 yamllint

test/sanity/code-smell/shebang.py

@@ -39,8 +39,7 @@ def main():
         'test/utils/shippable/timing.py',
         'test/integration/targets/old_style_modules_posix/library/helloworld.sh',
         # The following are Python 3.6+.  Only run by release engineers
-        'hacking/release-announcement.py',
-        'hacking/porting-guide.py',
+        'hacking/build-ansible',
     ])
 
     # see https://unicode.org/faq/utf_bom.html#bom1

test/sanity/compile/python2.6-skip.txt

@@ -1,3 +1,3 @@
 # The following are only run by release engineers who can be asked to have newer Python3 on their systems
-hacking/release-announcement.py
-hacking/porting-guide.py
+hacking/build_library/build_ansible/command_plugins/porting_guide.py
+hacking/build_library/build_ansible/command_plugins/release_announcement.py

test/sanity/compile/python2.7-skip.txt

@@ -1,3 +1,3 @@
 # The following are only run by release engineers who can be asked to have newer Python3 on their systems
-hacking/release-announcement.py
-hacking/porting-guide.py
+hacking/build_library/build_ansible/command_plugins/porting_guide.py
+hacking/build_library/build_ansible/command_plugins/release_announcement.py

test/sanity/compile/python3.5-skip.txt

@@ -1,3 +1,3 @@
 # The following are only run by release engineers who can be asked to have newer Python3 on their systems
-hacking/release-announcement.py
-hacking/porting-guide.py
+hacking/build_library/build_ansible/command_plugins/porting_guide.py
+hacking/build_library/build_ansible/command_plugins/release_announcement.py