Update docs styling

Fixes #11255

Fixes #11606

fix AnsibleError object name in subelements plugin

fixes #11624

fixes 11607, override ansible_ssh_port in group/host_vars

profile_tasks.py requires CALLBACK_ constants or the v2 code doesn't pass the …

callbacks require a version constant or the v2 code doesn't pass the display param and it gives an error

now version_added < 1.3 does not get shown, up from 1.0
option's version_added is also now filterd against this threshold
module version_added is more prominent
exaples now uses pure rst instead of intermingled with html formatting
aliases now shown in description for options
bad version fields now throw warnings instead of exceptions
ansible-doc errors now show traceback in very very verbose mode, for easier debugging

devel breaks «gathering=explicit» setting in ansible.cfg

hacking/test-module updated to use new loader

Add plugin that profiles playbook tasks

Resubmission of https://github.com/ansible/ansible/pull/11270 to
correct v2 file location.

[Description and console output
demonstration](https://github.com/aioue/ansible-plugin-profile/blob/mast
er/README.md#features).

Provides per-task timing, ongoing playbook elapsed time and ordered
list of top 20 longest running tasks at end.

There was a confusion between the valid values for defaults.gathering
(explicit/implicit/smart) and a play's gather_facts setting (boolean),
which resulted in gathering=explicit being ignored.

hacking/test-module, updated to new location and non-classness of module_common

Use same interpreter for test-module and module it runs

vmware.py: Fix to handle user directory correctly (e.g. ~/.ansible/tmp).

Fixes #11247

Was causing an odd error which threw off the error detection code
when the datastructure was a string corresponding to a variable.

Fix #11369 A result is skipped when all it's children are skipped. Th…