Fixes #19781 - Fix Layout/LeadingCommentSpace cop

Fixes #19700 - update rubocop rules

The following changes have been made:

- Performance/RedundantMerge:
changes lines such as:
```not_found_message.merge! :message => options```
to:
```not_found_message[:message] = options```

- converts str.match() to str =~ ()...

Fixes #16491 - Upgrade rubocop to version 0.42

fixes #15659 - replace deprecated Object#timeout call

Fixes #10183 - Added a default results transformation for status action

fixes #13430 - add missing actions to virt power manager

When rebooting a vm via power manager, this fails:

| TypeError: nil is not a symbol | /Users/f0218175/foremandev/foreman/app/services/power_manager/virt.rb:25:in
`block (2 levels) in <class:Virt>'...

Fixes #10713 - improved backtrace logging

• full trace in 500 page in production shows really the full trace
• Foreman::Logging.exception as an unified entry point for exceptions logging
• the backtrace cleaner doesn't delete the plugins
• the orchestration exceptions gets the backtrace covered by logger...

Refs #3809 - Remove cops for empty lines

Fixes #746 - Generate all the Host template when click on Build to avoid errors during installation

Refs #3809 - Remove rubocop TODOs

Removed the following TODOs so that cops for these will run from now on:

Lint/AmbiguousOperator, DefEndAlignment, DeprecatedClassMethods
EnsureReturn, RequireParentheses, Void, BlockAlignment, EndAlignment,
UselessAccessModifier,...