Enable QuickJit by default (#24576)
Enable QuickJit by default (#24576)

- Recently, a decision was made to enable QuickJit by default. In startup perf, this mode appears to be consistently better than with QuickJit disabled, and usually equal or better than with TieredCompilation disabled.
- QuickJitForLoops remains disabled by default, so this enables QuickJit only for methods that don't contain loops
cshung/coreclr,wtgodbe/coreclr,krk/coreclr,poizan42/coreclr,cshung/coreclr,krk/coreclr,poizan42/coreclr,cshung/coreclr,cshung/coreclr,krk/coreclr,poizan42/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,krk/coreclr,cshung/coreclr,cshung/coreclr,poizan42/coreclr,poizan42/coreclr,krk/coreclr,wtgodbe/coreclr,krk/coreclr,wtgodbe/coreclr,poizan42/coreclr