Increase remote import URL character length limit from 512 to 2048

Changelog: changed

db/post_migrate/20220321025720_alter_constraint_remote_import_url.rb

+# frozen_string_literal: true
+
+class AlterConstraintRemoteImportUrl < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  def up
+    remove_text_limit :import_export_uploads, :remote_import_url
+    add_text_limit :import_export_uploads, :remote_import_url, 2048
+  end
+
+  def down
+    # no-op
+  end
+end

db/schema_migrations/20220321025720

+b1d67334e1e52a24b3ea45d1520878dac7ea6dd7fba61d966e4311212993ee77
\ No newline at end of file

db/structure.sql

@@ -15794,7 +15794,7 @@ CREATE TABLE import_export_uploads (
     export_file text,
     group_id bigint,
     remote_import_url text,
-    CONSTRAINT check_58f0d37481 CHECK ((char_length(remote_import_url) <= 512))
+    CONSTRAINT check_58f0d37481 CHECK ((char_length(remote_import_url) <= 2048))
 );
 
 CREATE SEQUENCE import_export_uploads_id_seq