Add a bit on the isolate which indicates that the stack is currently
not iterable for the SafeStackFrameIterator.

This is needed during deoptimization, when we do a fast C call without
a return address on the stack, meaning we can't iterate the stack
frames.

Re-enable DeoptAtFirstLevelInlinedSource which is fixed by this CL.

Bug: v8:9057
Change-Id: I76379a2dd38023be7e6f5153edeb1f838e9ac4d6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1688049
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62634}