SQLite backed cache: Support sorting mgmt clusters on value in a specific condition (#447)

* Replace primary/secondary sort fields with an array of sort directives.

* Allow more than 2 sort-params in a search query.

* Add a virtual 'status.ready' field to clusters.

* Rename status.ready -> status.connected

* Set virtual field 'spec.internal' <- spec.displayName == 'local'

* Need to declare all virtual fields to index.

* Ready clusters have condition[type==Ready && status=True]

* Update the README to reflect generalized sorting.

* Bump lasso to get revised sort directives.

* Review-driven changes, mostly comments and drop unneeded code.

* Add unit tests to verify sort-order stringification.

* Ignore empty-string sort components.

* Fix a rebase mishap.

* Drop unneeded commented-out code.

* Clusters have a 'spec.internal' field, no need to synthesize one.

* Added a note on square-brackets for label references.

This should be added to the README for filter queries in the PR for 46333.

* Bump to latest sqlcache-free lasso

pkg/stores/sqlproxy/proxy_store.go

@@ -127,6 +127,7 @@ var (
 			{"metadata", "labels[provider.cattle.io]"},
 			{"spec", "internal"},
 			{"spec", "displayName"},
+			{"status", "connected"},
 			{"status", "provider"},
 		},
 		gvkKey("management.cattle.io", "v3", "Node"): {