* Vector bitcast support (AArch64 & Interpreter)
Implemented support for `bitcast` on vector values for AArch64 and the
interpreter.
Also corrected the verifier to ensure that the size, in bits, of the input and
output types match for a `bitcast`, per the docs.
Copyright (c) 2022 Arm Limited
* `I128` same-type bitcast support
Copyright (c) 2022 Arm Limited
* Directly return input for 64-bit GPR<=>GPR bitcast
Copyright (c) 2022 Arm Limited
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