test_cmp_http: decrease risk of timeouts due to delays caused by the …

…underlying system running tests

Fixes #22870

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
(Merged from #23502)

(cherry picked from commit 0969375)

test/recipes/80-test_cmp_http_data/Mock/test.cnf

@@ -1,6 +1,7 @@
 [default]
 batch = 1 # do not use stdin
-total_timeout = 8 # prevent, e.g., infinite polling due to error
+total_timeout = 20  # is used to prevent, e.g., infinite polling due to error;
+# should hopefully be enough to cover delays caused by the underlying system
 trusted = trusted.crt
 newkey = new.key
 newkeypass =
@@ -44,7 +45,6 @@ sleep = 0
 ############################# aspects
 
 [connection]
-msg_timeout = 5
 total_timeout =
 # reset any TLS options to default:
 tls_used =