Describe the bug
When the project (including phpcs vendor folder) is run from a windows network drive (either mapped to drive, or by Path) phpcs cannot be run as it believes the config is not readable.

Code sample
N/A

Custom ruleset
N/A

To reproduce
Steps to reproduce the behavior:

1. Create project on mapped network drive
2. Run phpcs --version
3. See error message displayed

ERROR: Config file \\WSL$\UBUNTU\home\ubuntu\www\vendor\squizlabs\php_codesniffer\CodeSniffer.conf is not readable

ERROR: Config file U:\home\ubuntu\www\vendor\squizlabs\php_codesniffer\CodeSniffer.conf is not readable

Expected behavior
It should work

Versions (please complete the following information):

• OS: Windows 10 with WSL
• PHP: 7.4.21
• PHPCS: 3.6.0
• Standard: N/A

Additional context
It is the same issue with php's is_readable function that was worked round with this fix. d56e167

is_readable is called here.

is_readable should be changed to Util\Common::isReadable as per previous fix