build: Add ci profile that uses --release

As we add more rust crates in performance-critical places,
we run into some performance issues with debug builds.
This makes it hard to get a good feel for the performance
of the application, as something may be slow simply because
it's not been optimized by the compiler.

This commit adds a ci profile to our meson options,
and adjusts our CI configuration to use it. Regular
builds should continue to use the development profile.

Also renames `default` to `release`

meson.build

@@ -22,7 +22,7 @@ iv_pkgdatadir = iv_datadir / meson.project_name()
 profile = ''
 version_suffix = ''
 
-if get_option('profile') == 'development'
+if get_option('profile') != 'release'
   profile = '.Devel'
   vcs_tag = run_command('git', 'rev-parse', '--short', 'HEAD', check: false).stdout().strip()
   if vcs_tag == ''