patch 9.2.0729: % skips parens on continued quoted lines

patch 9.2.0729: % skips parens on continued quoted lines

Problem:  The "%" command and bracket/text-object motions can skip the
          matching paren or bracket on a line with quotes and a trailing
          backslash.
Solution: Use the quote state at the search start when an odd-quote line
          is continued with a backslash, instead of always treating the
          search as starting in quotes (Barrett Ruth).

closes: #20631

Signed-off-by: Barrett Ruth <br@barrettruth.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>