PEAR/Squiz/[MultiLine]FunctionDeclaration: allow for PHP 8.1 new in initializers

[jrfnl]

Since PHP 8.1, new ClassName() expressions can be used as the default value of a parameter in a function declaration.

new ClassName() expressions should be treated as function calls, which have their own indentation rules, so the PEAR.Functions.FunctionDeclaration and the Squiz.Functions.MultiLineFunctionDeclaration sniffs should skip over these and not attempt to change the indentation of parameters in those function calls.

This commit implements this change.

Includes unit tests.

Refs:

• https://wiki.php.net/rfc/new_in_initializers
• https://www.php.net/manual/en/migration81.new-features.php#migration81.new-features.core.new-in-initializer
• https://www.php.net/manual/en/language.oop5.decon.php#language.oop5.decon.constructor.new

Fixes #3786

---

Note:

• I have also verified that the File::getMethodParameters() method handles "new in initializers" correctly.
• And based on a cursory code check of the Squiz.Functions.FunctionDeclaration, the Squiz.Functions.FunctionDeclarationArgumentSpacing and the PSR2.Methods.MethodDeclaration sniffs, I don't foresee that those need changes for "new in initializers".

[jrfnl]

Note: this PR will conflict with the already open PRs #3739 and #3661 and depending on the merge order, rebasing and conflict resolution will be needed....

[jrfnl]

FYI: this fix is included in today's PHP_CodeSniffer 3.8.0 release.

As per #3932, development on PHP_CodeSniffer will continue in the PHPCSStandards/PHP_CodeSniffer repository. If you want to stay informed, you may want to start "watching" that repo (or watching releases from that repo).