conformance_computeinfo does not test all GPU devices if device type is mentioned through OS envvar.

conformance_computeinfo prints config information about devices. User can choose type of the device like gpu, cpu, accerlerator etc from OS envvar.
But it has a flawed logic wherein it would test only one device if device type is mentioned through OS envvar, even if there are multiple devices of same type i.e. it hard codes device index to 0.

Start at the conformance_computeinfo entry point and trace how the OS environment variable selects a device type. Replace the fixed device index 0 behavior so every device of the selected type is tested, then verify the result with an environment-selected type and multiple devices.

Written by the indexing model from the issue text.