Merge topic 'modernize_string_view_cmOutputConverter'

ec892a572b cmOutputConverter: Make shell escaping methods cm::string_view based
8573e20c43 cmOutputConverter: Let GetFortranFormat accept a cm::string_view
4911762358 cmOutputConverter: Return bool instead of int in utility functions
a929255dec cmOutputConverter: Let cmOutputConverterIsShellOperator accept cm::string_view
1b30b28c04 cmOutputConverter: Let cmOutputConverterIsShellOperator accept cm::string_view
6675f785be cmOutputConverter: Let EscapeForCMake accept a cm::string_view
09977c1816 cmSystemTool: Let TrimWhitespace accept a cm::string_view
2f19e53705 cmSystemTool: Let HelpFileName accept a cm::string_view
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3615