Weaken response argument types in django.utils.cache (#2704)

These functions just look at response headers, so `HttpResponseBase` is
perfectly fine.  This is useful when working with responses returned by
methods such as `django.test.Client.get`.

Author: cjwatson

django-stubs/utils/cache.pyi

@@ -8,7 +8,7 @@ from django.http.response import HttpResponse, HttpResponseBase
 cc_delim_re: Any
 
 def patch_cache_control(response: HttpResponseBase, **kwargs: Any) -> None: ...
-def get_max_age(response: HttpResponse) -> int | None: ...
+def get_max_age(response: HttpResponseBase) -> int | None: ...
 def set_response_etag(response: HttpResponseBase) -> HttpResponseBase: ...
 def get_conditional_response(
     request: HttpRequest,
@@ -19,13 +19,13 @@ def get_conditional_response(
 def patch_response_headers(response: HttpResponseBase, cache_timeout: int | None = ...) -> None: ...
 def add_never_cache_headers(response: HttpResponseBase) -> None: ...
 def patch_vary_headers(response: HttpResponseBase, newheaders: Iterable[str]) -> None: ...
-def has_vary_header(response: HttpResponse, header_query: str) -> bool: ...
+def has_vary_header(response: HttpResponseBase, header_query: str) -> bool: ...
 def get_cache_key(
     request: HttpRequest, key_prefix: str | None = ..., method: str = ..., cache: BaseCache | None = ...
 ) -> str | None: ...
 def learn_cache_key(
     request: HttpRequest,
-    response: HttpResponse,
+    response: HttpResponseBase,
     cache_timeout: float | None = ...,
     key_prefix: str | None = ...,
     cache: BaseCache | None = ...,