perf: use libxml2 patch for faster xpath context init #2592

Job	Run time
rubocop	27s
basic (ubuntu, enable)	42s
gumbo (ubuntu)	24s
gumbo (windows)	1m 8s
gumbo (macos)	26s
ruby_versions	1s
css parser	23s
musl (enable)	23s
musl (disable)	23s
darwin-nix (enable)	35s
jruby (jruby-9.4)	23s
libxmlruby (enable, 3.3)	29s
darwin-nix (disable)	35s
rcd_image_version	1s
truffleruby (--disable-system-libraries --disable-static)	1s
bsd (enable)	22s
truffleruby (--disable-system-libraries --enable-static)	1s
bsd (disable)	22s
truffleruby (--enable-system-libraries)	1s
memcheck (disable, 3.3)	1s
memory_suite (disable, 3.3)	1s
windows (enable, 3.1)	1s
osx (enable, 3.1)	1s
windows (enable, 3.2)	1s
linux (enable, 3.1)	1s
osx (enable, 3.2)	1s
windows (enable, 3.3)	1s
linux (enable, 3.2)	1s
osx (enable, 3.3)	1s
windows (enable, head)	1s
linux (enable, 3.3)	1s
osx (enable, head)	1s
windows (disable, 3.1)	8s
linux (enable, 3.4-rc)	1s
osx (disable, 3.1)	1s
windows (disable, 3.2)	1s
linux (disable, 3.1)	1s
osx (disable, 3.2)	1s
windows (disable, 3.3)	1s
linux (disable, 3.2)	1s
osx (disable, 3.3)	1s
windows (disable, head)	1s
linux (disable, 3.3)	1s
osx (disable, head)	1s
linux (disable, 3.4-rc)	1s
cruby-package	1s
generic-package	1s
jruby-package	1s
valgrind	1s
cruby-${{ matrix.platform }}-install (${{ matrix.ruby }})	1s
cruby-install-with-setup-ruby	1s
cruby-${{ matrix.platform }}-install (${{ matrix.ruby }})	1s
cruby-x64-mingw-ucrt-install	1s
generic-darwin-install	1s
generic-linux-install	1s
generic-windows-install	1s
jruby-${{ matrix.jruby }}-jre${{ matrix.jre }}-install	1s
musl-valgrind	1s
libxmlruby-valgrind	1s
	7m 54s

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