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ARM64: Fix assembly of HREFK.

Reported by caohongqing.
Fix contributed by Peter Cawley.

(cherry picked from commit 8fbd576fb)

`asm_hrefk()` uses the check for the offset for the corresponding node
structure. However, the target load is performed from its inner `key`
field with the offset 8. In the case of a huge table, it is possible
that the offset of the node (4095 * 8) is less than 4096 * 8 and can be
emitted via the corresponding instruction as an immediate offset, but
the offset of the `key` field is not. This leads to the corresponding
assertion failure in `emit_lso()`.

This patch fixes this behaviour by the correct check.

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

Part of tarantool/tarantool#11278

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