This commit makes a few changes:

Adds a new test for ingestion, that tests how multiple path matches in the
same Ingress work

Updates translation logic to sort into the order Exact, Regex, Prefix,
which means that regex matches that overlap with prefixes will now
route traffic.

Adds more cases to the unit tests for SortableRoute.Less(), which ensures
that more options are covered.

Also refactors the TestSharedIngressTranslator_getEnvoyHTTPRouteConfiguration test
to also check the contents of the path and cluster matches, as well as just the
listener name and virtual host name.

This was quite a bit more complex, because just comparing protobufs produces
very unhelpful failure outputs. This test design makes it more straightforward
to correct errors in the expected results.

Signed-off-by: Nick Young <nick@isovalent.com>