You are trying to emulate x86 to test those builds.
Rosetta doesn't emulate x86 hardware, but translates x86 instructions into ARM. The only thing your solution would get you is verification that the Intel build can work on Apple Silicon with Rosetta.
If testing on an Intel Mac is unacceptable, and testing on an ARM Mac using Rosetta is also unacceptable, then there was no reason to complain about Rosetta being deprecated in the first place.
You are trying to emulate x86 to test those builds.
Rosetta doesn't emulate x86 hardware, but translates x86 instructions into ARM. The only thing your solution would get you is verification that the Intel build can work on Apple Silicon with Rosetta.