[php-src] PR #24510: Fix GH-11709: Line breaks in quoted strings fail with INI_SCANNER_RAW

Pull Request: https://github.com/php/php-src/pull/24510 Author: cgsmith Fixes GH-11709. With INI_SCANNER_RAW a quoted value containing a line break failed to parse. INI_SCANNER_NORMAL and INI_SCANNER_TYPED handle it fine: ```ini b="line 1 line 2" ``` The raw value rule in zend_ini_scanner.l always stopped at the first newline. The value became "line 1 and the next line was parsed as a new key. This was either a syntax error (as in the issue) or silently wrong keys, e.g. b="open\nz=1" gave b => "open and z => 1". The raw scanner now keeps reading past a newline once inside a value that started with ". So long as a closing quote exists later. Line numbers are still counted for the consumed newlines. An unclosed quote keeps today's behaviour so input like the following still parses the same way: ```ini b="open z=1 ``` Tests: - ext/standard/tests/general_functions/gh11709.phpt: the issue's case, CRLF, a trailing comment, the unclosed-quote case and line numbers in later errors. Raw results match INI_SCANNER_NORMAL. - Zend/tests/bug69551.phpt: its input is exactly this pattern, so its expected output changes from the syntax error to SubnetMask => "\n" which is the same as normal mode. The original crash (a lone ", guarded by yyleng > 1) is no longer reached by that input, so I added a lone quote case to keep covering it. Targets PHP-8.4 as the lowest branch in active support.