Test with ext-mongodb 1.20 (#1449)

Author: alcaeus

Diff for: .evergreen/config.yml

@@ -72,3 +72,5 @@ include:
   - filename: .evergreen/config/generated/test/csfle.yml
   - filename: .evergreen/config/generated/test-variant/modern-php-full.yml
   - filename: .evergreen/config/generated/test-variant/legacy-php-full.yml
+  - filename: .evergreen/config/generated/test-variant/phpc.yml
+  - filename: .evergreen/config/generated/test-variant/lowest.yml

Diff for: .evergreen/config/generate-config.php

@@ -61,9 +61,8 @@
 // Test variants
 $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'modern-php-full.yml', $modernPhpVersions);
 $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'legacy-php-full.yml', $legacyPhpVersions);
-// TODO: Re-enable when 1.20.0 is released
-// $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'phpc.yml', [$latestPhpVersion]);
-// $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'lowest.yml', [$lowestPhpVersion]);
+$allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'phpc.yml', [$latestPhpVersion]);
+$allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'lowest.yml', [$lowestPhpVersion]);
 
 echo "Generated config. Use the following list to import files:\n";
 echo implode("\n", array_map('getImportConfig', $allFiles)) . "\n";