Misc fixes

[skirpichev]

• Support in-place lshift1's
• Remove zz_lshift()
• Remove zz_rshift()
• In-place zz_add/sub()
• Cleanup zz_divmod_near()
• Support in-place zz_copy/neg/abs()
• Add macro for unary slots
• Support in-place zz_invert(), cleanup binary logic ops
• Drop shift argument from zz_to_double()
• Support in-place zz_gcd/gcdext/sqrtrem()
• In-place zz_mul()
• In-place for zz_divmod()
• Remove zz_rem/quo()
• Fix zz_divmod/divmod_near() signatures
• Separate asserts in tests/test_functions.py
• Run smaller set of examples on GraalVM
• Build GraalPy wheels
• Update GraalPy version in build matrix
• Support fac() as an alias for factorial()
• Disable memory testing on PyPy
• Fix zz_from_i64() signature
• Fix zz_resize() signature
• zz_double_fac_ul -> zz_fac2_ul