repo: add ceph-18.2.2-mgr-ceph-module-stub.patch

This mocks out a module for mgr_module.py to 'import' during mypy
type analysis. Previously the ceph_module.pyi was enough for this to
work, but I guess something in the tooling changed.

I cannot figure out why this ever worked before, and why it doesn't
now.

Maybe related to python/mypy#16987 ?

ceph-18.2.2-mgr-ceph-module-stub.patch

@@ -0,0 +1,34 @@
+diff --git a/src/pybind/mgr/ceph_module.py b/src/pybind/mgr/ceph_module.py
+new file mode 100644
+index 00000000000..bfa21a853f4
+--- /dev/null
++++ b/src/pybind/mgr/ceph_module.py
+@@ -0,0 +1,28 @@
++# This is an interface definition of classes that are generated within C++.
++# Used by mypy to do proper type checking of mgr modules.
++# Without this file, all classes have undefined base classes.
++
++from typing import Any, Dict, List, Mapping, Optional, Sequence, Tuple, Union
++try:
++    from typing import Protocol  # Protocol was added in Python 3.8
++except ImportError:
++    class Protocol:  # type: ignore
++        pass
++
++class BasePyOSDMap(object):
++    pass
++
++class BasePyOSDMapIncremental(object):
++    pass
++
++class BasePyCRUSH(object):
++    pass
++
++class BaseMgrStandbyModule(object):
++    pass
++
++class CompletionT(Protocol):
++    pass
++
++class BaseMgrModule(object):
++    pass