Also minify #defines in PLS shaders

There is lots of text and whitespace in these macros. We used to just
copy them straight. This PR starts minimizing them. This shaves about 5k
off the GLSL strings and helps obfuscate what we're doing, which is good
now that we will ship shader source strings in clear text.

Diffs=
fbd486cea Also minify #defines in PLS shaders (#5648)

Co-authored-by: Chris Dalton <99840794+csmartdalton@users.noreply.github.com>