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FFI: Drop finalizer table rehash after GC cycle.

Reported by Sergey Kaplun.

(cherry picked from commit fb22d0f80)

The raising of the OOM error when rehashing the finalizer table (when we
can't allocate a new hash part) leads to crashes in either
`lj_trace_exit()` or `lj_trace_unwind()` due to unprotected error
raising, which either has no DWARF eh_frame [1] or loses the context of
the JIT compiler.

This patch drops rehashing of the cdata finalizer table to avoid these
crashes. It will prevent the cdata finalizer table from shrinking when a
huge amount of the cdata objects is collected by the GC. OTOH, the
finzlizer table most probably will grow anyway to the old size, so this
is not crucial.

Sergey Kaplun:
* added the description and the test for the problem

[1]: https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-Core-generic/LSB-Core-generic/ehframechpt.html

Part of tarantool/tarantool#10199
Resolves tarantool/tarantool#10290

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