Have the FRR one the default implementation when deploying with charts

The FRR implementation is now mature, and it is where all our efforts
are going, so it makes sense to have it as the default implementation.

Signed-off-by: Federico Paolinelli <fpaoline@redhat.com>

charts/metallb/values.yaml

@@ -319,7 +319,7 @@ speaker:
   # frr contains configuration specific to the MetalLB FRR container,
   # for speaker running alongside FRR.
   frr:
-    enabled: false
+    enabled: true
     image:
       repository: quay.io/frrouting/frr
       tag: 8.4.2