Use "OpenPGP" instead of "PGP" in distro-sync, gpg

[evan-goode]

Following up from this comment: #1601 (review).

These lines do use .* in some places, so instead of converting them to stderr contains lines, I added ^ and $ to further constrain the regex.

[kontura]

I was thinking if the steps stderr/stdout contains lines matching should add the ^ and $ automatically for all lines?

What do you think?

[evan-goode]

Sounds good, tests are passing locally with that change.

[kontura]

Great, thank you!