Inliner: fix assert about repeated failing observations

Inliner: fix assert about repeated failing observations

When an inlining attempt is going to fail, the jit aims to bail out of
the attempt as quickly as possible, since any further work on this
inline will just waste time and memory. The jit monitors this in part
by asserting that it only makes one failing observation.

However, there are as few places where failing fast during inlining is
not currently possible, and repeated failing observations may occur.

This change loosens the assertion check to allow repeated
`CALLSITE_TOO_MANY_LOCALS` observations. This observation is made
at a fairly deep stack in `lvaGrabTemp` with no easy route to bail
out in case of imminent failure.

Closes #3586.