[TSan] Interlock and unlock MonoJitStats (#5437)

[TSan] Interlock and unlock MonoJitStats (#5437)

[TSan] Interlock and unlock MonoJitStats

This is the first part of telling TSan what to do with `MonoJitStats`; I dealt with all the `gint32` values and partly touched the `gboolean` value (see `FIXME`). However, `MonoJitStats` also contains `gdouble` which can (1) probably be interlocked and (2) will be updated in a later step, together with the `FIXME`, as soon as an updated version of the atomic interface exists.

I did my best to distinguish between perf. critical parts and parts where `Interlocked* ()` seems to work perfectly fine. As before, if I misjudged anything, I would kindly ask to comment the affected operations, and I will update them accordingly.

More (technical) details can be found in the commit messages.