internal/core/runtime: select evaluator version with specific constants
Do not rely on DefaultVersion and DevVersion to represent evalv2
and evalv3, because DefaultVersion is now flipping to evalv3.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
Change-Id: I10b46d77fa086e25a4e4c1c7f81cbb7ac24c13e0
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1212504
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
Reviewed-by: Matthew Sackman <matthew@cue.works>
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>