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Fix TDUP load forwarding after table rehash.

Reported by Sergey Kaplun.

(cherry-picked from commit c7db8255e)

After table rehashing number keys loaded via ALOAD may be placed in the
hash part of the table. So, load forwarding analysis missed the
corresponding stores like they never existed. In that case, either we
faced an assertion failure in `fwd_ahload()` due to value types
mismatch, or we faced an assertion failure in `rec_check_slots()` since
the forwarded value by the JIT compiler isn't the same as it is in the
interpreter.

This patch adds a check that there is no `IR_NEWREF` after table
creation, so it can't be rehashed.

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

Part of tarantool/tarantool#8825

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