Fix vim9script 9 not restoring v:exception/etc after catching exceptions #246

Job	Run time
linux (tiny, clang, native)	2m 32s
macos (tiny, macos-13)	1m 40s
windows (HUGE, msvc, no, no, x64, stable)	7m 17s
linux (tiny, gcc, native)	4m 1s
macos (tiny, macos-15)	41s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	12m 51s
linux (normal, clang, native)	5m 59s
macos (normal, macos-13)	7m 3s
windows (HUGE, msvc, no, yes, x86)	10m 34s
linux (normal, gcc, native)	8m 28s
macos (normal, macos-15)	5m 17s
macos (huge, macos-13)	19m 57s
linux (huge, clang, native)	12m 8s
windows (HUGE, mingw, yes, no, x64, yes)	10m 44s
macos (huge, macos-15)	17m 42s
linux (huge, gcc, native)	16m 46s
windows (NORMAL, msvc, yes, no, x86)	7m 41s
windows (NORMAL, mingw, no, yes, x64)	9m 44s
linux (tiny, clang, nogui)	2m 23s
windows (TINY, msvc, yes, yes, x64)	2m 7s
linux (tiny, gcc, nogui)	4m 22s
windows (TINY, mingw, no, no, x86)	2m 28s
linux (normal, gcc, i386, ./src/shadow)	9m 8s
linux (huge, gcc, uchar, testgui, true, dynamic)	13m 12s
linux (huge, clang, asan, 5.1)	25m 19s
linux (huge, gcc, unittests, true)	5m 24s
linux (normal, gcc, vimtags)	4m 49s
	3h 50m 17s

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