PyPy: PyPy v7.3.18 release

The PyPy team has released version 7.3.18 of PyPy, which includes a Python 3.11 interpreter labeled as "beta". This release includes a large set of bugfixes thanks to the use of fusil on the 3.10 builds. The libffi shipped in portable builds has been updated, and PyPy now statically links to libffi where possible, reducing shared object dependencies. The release also includes code to show native function names when profiling with VMProf, currently only supported on Linux. A PEP 768-inspired remote debugging facility has been added, and the HPy backend has been updated to the latest HPy HEAD. The release includes three interpreters: PyPy2.7, PyPy3.10, and PyPy3.11, each supporting the syntax and features of their respective Python versions. The interpreters are based on the same codebase, making it a micro release with compatible APIs. The PyPy team recommends updating and encourages contributors to join the project. The team also thanks donors for their continued support and invites Python library maintainers to make HPy/CFFI/cppyy versions of their libraries for better performance on PyPy.