add persistent option for modprobe (#5424)
* add persistent option for modprobe
* add suggested changes + fix broken test
* change modprobe module path in tests due to rebase
* change persistent option type from bool to str with choices
* fix unused import
* add example with persistent option
* fix some minor issues after review
- move regexps compiling to __init__
- move AnsibleModule to build_module function and use this function in tests instead of AnsibleModule
- fix terminlogy issue in documentation
* fix unused-import
(cherry picked from commit 29f5033737)
Co-authored-by: Alex Groshev <38885591+haddystuff@users.noreply.github.com>
