Add build/test tasks for PHP 8.3

Author: alcaeus

.evergreen/config.yml

@@ -48,6 +48,7 @@ include:
   - filename: .evergreen/config/test-variants.yml
 
   # Automatically generated files
+  - filename: .evergreen/config/generated/build/build-php-8.3.yml
   - filename: .evergreen/config/generated/build/build-php-8.2.yml
   - filename: .evergreen/config/generated/build/build-php-8.1.yml
   - filename: .evergreen/config/generated/build/build-php-8.0.yml

.evergreen/config/generate-config.php

@@ -3,6 +3,7 @@
 
 // Supported PHP versions. Add new versions to the beginning of the list
 $supportedPhpVersions = [
+    '8.3',
     '8.2',
     '8.1',
     '8.0',