[GlobalISel] Use more inline elements in a match table SmallVector (#202568)
The 4 inline elements for OnFailResumeAt only cover 36.8% (33455 / 90902) of
aarch64-isel executeMatchTable invocations encountered while compiling sqlite3
on aarch64-O0-g.
The 8 inline elements cover 100% (maximum observed depth was 6). Small -0.09%
CTMark geomean improvement on aarch64-O0-g.
https://llvm-compile-time-tracker.com/compare.php?from=2de2edb943fe1b83d79bdffa03606eb8c5452e9b&to=8deb4f949b5f80a26a8a61775fb411bf30fefd80&stat=instructions%3Au
Assisted-by: codex