MB-53513 Reduce key.log size and number of files

Change-Id: Ia79e2b3bcc50f7978f611415dd0a44350259c198
Reviewed-on: https://review.couchbase.org/c/ns_server/+/183117
Tested-by: Peter Searby <peter.searby@couchbase.com>
Well-Formed: Build Bot <build@couchbase.com>
Reviewed-by: Timofey Barmin <timofey.barmin@couchbase.com>

etc/static_config.in

@@ -36,4 +36,10 @@
               {num_files, 2},
               {buffer_size_max, 52428800}]}]}.
 
+{disk_sink_opts_disk_tls_key_log,
+ [{rotation, [{compress, true},
+              {size, 10485760},
+              {num_files, 1},
+              {buffer_size_max, 13107200}]}]}.
+
 {net_kernel_verbosity, 10}.