httpc: fix reading data in a chunked request

There was a problem: chunked request to etcd via TLS using builtin http
client returns nothing. The problem was reproduced quite often by a test
`integration.general.tls` in etcd-client Lua module. The patch updates
curl submodule to a version based on 8.5.0 release with applied patch
with fix [1].

The patch also removes workaround for aforementioned problem made in
commit aa58c21 ("httpc: use http 1.1 by default").

1. curl/curl@cdd905a

Fixes #9547

NO_TEST=etcd-client tests
NO_DOC=bugfix

changelogs/unreleased/gh-9547-fix-reading-data-in-chunked-request.md

@@ -0,0 +1,4 @@
+## bugfix/httpc
+
+* Fixed a bug when read from a chunked request returns
+  nothing (gh-9547).

src/httpc.c

@@ -214,8 +214,6 @@ httpc_request_new(struct httpc_env *env, const char *method,
 			 curl_easy_header_cb);
 	curl_easy_setopt(req->curl_request.easy, CURLOPT_NOPROGRESS, 1L);
 	curl_easy_setopt(req->curl_request.easy, CURLOPT_NOSIGNAL, 1L);
-	curl_easy_setopt(req->curl_request.easy, CURLOPT_HTTP_VERSION,
-			 CURL_HTTP_VERSION_1_1);
 
 	ibuf_create(&req->send, &cord()->slabc, 1);