Shared packs: Depend on codeql/tutorial from all language libraries

This allows `import tutorial` from queries targeting
any language, just like before, while removing the
duplicate copies of `tutorial.qll`.

python/ql/lib/qlpack.yml

@@ -7,5 +7,6 @@ library: true
 upgrades: upgrades
 dependencies:
   codeql/regex: ${workspace}
+  codeql/tutorial: ${workspace}
 dataExtensions:
   - semmle/python/frameworks/**/model.yml