mod+healthcheck: use new tor submodule

Using the tor module instead of whole lnd in healthcheck allows us to
get rid of a lot of indirect dependencies.

healthcheck/go.mod

@@ -4,8 +4,11 @@ go 1.16
 
 require (
 	github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f
-	github.com/lightningnetwork/lnd v0.14.2-beta
 	github.com/lightningnetwork/lnd/ticker v1.1.0
+	github.com/lightningnetwork/lnd/tor v1.0.0
 	github.com/stretchr/testify v1.7.0
-	golang.org/x/sys v0.0.0-20210915083310-ed5796bab164
+	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
 )
+
+// TODO(guggero): Remove these after merging #6350 and pushing the new tag!
+replace github.com/lightningnetwork/lnd/tor => ../tor