Resolve stubtest allowlist entries for ldap3 (#9532)

stubs/ldap3/@tests/requirements-stubtest.txt

@@ -0,0 +1 @@
+gssapi

stubs/ldap3/@tests/stubtest_allowlist.txt

@@ -1 +0,0 @@
-ldap3.protocol.sasl.kerberos  # requires gssapi package to import

stubs/ldap3/METADATA.toml

@@ -1,2 +1,8 @@
 version = "2.9.*"
 requires = ["types-pyasn1"]
+
+[tool.stubtest]
+apt_dependencies = ["libkrb5-dev"]
+# No need to install on the CI. Leaving here as information for MacOs/Windows contributors.
+# brew_dependencies = ["krb5"]
+# choco_dependencies = ["mitkerberos"]