Attempt to fix terraform outputs in GHA

[GaryGSC]

Based on this line (and this code, which shouldn't print "s unless those were in stdout.contents), I think something in setup-terraform's approach to catching stdout is adding the "s.

This approach avoids setup-terraform's stdout to output process entirely and allows us to consolidate 4 steps into 1, which looks cleaner in my opinion (and might shave off a second or two, since we don't need to start processes and shells for each step).

I haven't actually tested this new process yet.