Fix some errors in GeoDjango stubs (#1335)

* Fix overloading of GeoDjango Layer.get_geoms
* geometry's wkb is memoryview, not bytes
* Fix default value for geos param
* ewkb is also memoryview

Author: ciscorn

django-stubs/contrib/gis/gdal/geometries.pyi

@@ -60,7 +60,7 @@ class OGRGeometry(GDALBase):
     @property
     def wkb_size(self) -> int: ...
     @property
-    def wkb(self) -> bytes: ...
+    def wkb(self) -> memoryview: ...
     @property
     def wkt(self) -> str: ...
     @property

django-stubs/contrib/gis/gdal/layer.pyi

@@ -41,7 +41,7 @@ class Layer(GDALBase):
     spatial_filter: OGRGeometry | None
     def get_fields(self, field_name: str) -> list[Any]: ...
     @overload
-    def get_geoms(self, geos: Literal[True] = ...) -> OGRGeometry: ...
+    def get_geoms(self, geos: Literal[False] = ...) -> list[OGRGeometry]: ...
     @overload
-    def get_geoms(self, geos: Literal[False]) -> GEOSGeometry: ...
+    def get_geoms(self, geos: Literal[True]) -> list[GEOSGeometry]: ...
     def test_capability(self, capability: AnyStr) -> bool: ...

django-stubs/contrib/gis/geos/geometry.pyi

@@ -82,9 +82,9 @@ class GEOSGeometryBase(GEOSBase):
     def json(self) -> str: ...
     geojson: str
     @property
-    def wkb(self) -> bytes: ...
+    def wkb(self) -> memoryview: ...
     @property
-    def ewkb(self) -> bytes: ...
+    def ewkb(self) -> memoryview: ...
     @property
     def kml(self) -> str: ...
     @property