Revert "Reapply D70800: Fix AArch64 AAPCS frame record chain"

This reverts commit e9d9a612.

This patch was previously revert by 04879086
with the reapplication being done after breaking the assert used to
ensure SP is always 16-byte aligned, which is a requirement of the AAPCS.

For extra context the latest patch caused runtime failures when
building with "-march=armv8-a+sve -mllvm -aarch64-sve-vector-bits-min=256".