chore: update gitignore list (#9437)

Updated the gitignore list with the command : `go run scripts/generate-gitignores.go`

options/gitignore/Drupal7

@@ -0,0 +1,43 @@
+# gitignore template for Drupal 7 projects
+#
+# It is recommended that you use `Drupal.gitignore` as this is the latest version
+
+# Ignore configuration files that may contain sensitive information.
+sites/*/*settings*.php
+sites/example.sites.php
+
+# Ignore paths that contain generated content.
+files/
+sites/*/files
+sites/*/private
+sites/*/translations
+
+# Ignore default text files
+robots.txt
+/CHANGELOG.txt
+/COPYRIGHT.txt
+/INSTALL*.txt
+/LICENSE.txt
+/MAINTAINERS.txt
+/UPGRADE.txt
+/README.txt
+sites/README.txt
+sites/all/libraries/README.txt
+sites/all/modules/README.txt
+sites/all/themes/README.txt
+
+# Ignore everything but the "sites" folder ( for non core developer )
+.htaccess
+web.config
+authorize.php
+cron.php
+index.php
+install.php
+update.php
+xmlrpc.php
+/includes
+/misc
+/modules
+/profiles
+/scripts
+/themes