The following bit casting method using reinterpret_cast
has undefined behaviour:
```
int a = 1;
float b = *reinterpret_cast<float*>(&a);
```
Above breaks the strict aliasing rule which indicates:
> dereferencing pointers to objects of different types will
never refer to the same memory location.

More information can be found under src/base/macros.h.

`bit_cast` here is implemented with `memcpy` behind the scenes.
C++20 will have this feature included by default.

Change-Id: I69ffdbeba6db64e24b268d838ea1d863fcd9121d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2889331Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#74513}