DEV: Improve performance of system tests by disabling GPU in chrome (#21882)

It seems like the overhead of GPU acceleration is not worth it and is
slowing down our system tests. Locally the following command completes
in `2 minutes 8.6 seconds` with GPU disabled as compared to `2 minutes 45.4 seconds` with GPU enabled.

spec/rails_helper.rb

@@ -650,6 +650,7 @@ def apply_base_chrome_options(options)
   options.add_argument("--disable-dev-shm-usage")
   options.add_argument("--mute-audio")
   options.add_argument("--force-device-scale-factor=1")
+  options.add_argument("--disable-gpu")
 end
 
 class SpecSecureRandom