PHP version variables moved to GitLab global variables so that groups or projects can override them

examples/build-test-deploy.yml

@@ -2,9 +2,6 @@ variables:
   THEME_BASE_PATH: web/themes/custom/mytheme
   THEME_CSS_PATH: web/themes/custom/mytheme/css
   DISABLE_DEPLOYMENT_LOCAL: 0
-  PHP_VERSION: '8.1'
-  PHP_MAJOR_VERSION: 8
-  PHP_MINOR_VERSION: 1
   IGNORE_COMPOSER_EXTENDED_AUDIT: 0
 
 include: