CLSA-2026-1778602862 vim: Fix of 4 CVEs

CVE-2022-2175: fix invalid memory access in cmdlineinsertreg when using an expression on the command line; save/restore newcmdpos around the expression evaluation exgetln.c, upstream patch 8.2.5148; hunk 3 context adjusted for 8.2.2637 - CVE-2022-3256: fix use-after-free in movemark when an...