Increase the extension server request timeout to 1 minute (#10800)

pg_search is 46ish MB. All other remote extensions are around hundeds of
KB. 3 seconds is not long enough to download the tarball if the S3
gateway cache doesn't already contain a copy. According to our setup,
the cache is limited to 10 GB in size and anything that has not been
accessed for an hour is purged.

This is really bad for scaling to 0, even more so if you're the only
project actively using the extension in a production Kubernetes cluster.

Signed-off-by: Tristan Partin <tristan@neon.tech>

pgxn/neon/extension_server.c

@@ -14,7 +14,7 @@
 
 #include "utils/guc.h"
 
-#include "extension_server.h" 
+#include "extension_server.h"
 #include "neon_utils.h"
 
 static int	extension_server_port = 0;
@@ -45,7 +45,7 @@ neon_download_extension_file_http(const char *filename, bool is_library)
 		handle = alloc_curl_handle();
 
 		curl_easy_setopt(handle, CURLOPT_CUSTOMREQUEST, "POST");
-		curl_easy_setopt(handle, CURLOPT_TIMEOUT, 3L /* seconds */ );
+		curl_easy_setopt(handle, CURLOPT_TIMEOUT, 60L /* seconds */ );
 	}
 
 	compute_ctl_url = psprintf("http://localhost:%d/extension_server/%s%s",