* CI: upgrade runner to Ubuntu 22.04
- Compile with GCC 11 and Clang 14.
- Remove redundant PPAs.
- Use system provided Meson.
- Update LeakSanitizer suppressions.
* CI: ensure `VIPS_BLOCK_UNTRUSTED` is tested
`magicksave` cannot be used for testing when building with
`-Dmodules=enabled` (default), since that would require the
loadable modules to be installed first.
* LSan: remove GLib suppression
* LSan: disable the fast unwinder to get full stacktraces
* Move ASan/UBSan fuzzer options to CI configuration
* LSan: remove EOLed python2.7 suppression
* LSan: remove libstdc++ suppression
* LSan: add libx265 to suppression file
* Try to reproduce small memleak
* Try a possible patch
* Skip test if `im_benchmark` is not available
* CI: upgrade Clang version to 13
* CI: correct job names
* Meson: increase the timeout for tests
* README.md: correct Meson invocation
- Python 2.7 reached the end of its life on January 1st, 2020.
- The ASAN suppression parse errors seems to be fixed within Clang 10.
- Fix macOS build by updating the base 'osx_image' to 'xcode11'.
