Rename template parameter of ReadMultiple
Rename template parameter of ReadMultiple

The old parameter indicated the container held bytes, but it could
contain arbitrary objects - bytes, structures, anything trivially copy
assignable.

PiperOrigin-RevId: 280063676
Change-Id: I644561fff67782ece724f449be3bf0291519c437

google/asylo,google/asylo,google/asylo,google/asylo,google/asylo,google/asylo