service: plumb contexts to all (most) threads (#7363)

This continues the push of plumbing contexts through tendermint. I
attempted to find all goroutines in the production code (non-test) and
made sure that these threads would exit when their contexts were
canceled, and I believe this PR does that.

node/node_test.go

@@ -528,7 +528,8 @@ func TestNodeNewSeedNode(t *testing.T) {
 	nodeKey, err := types.LoadOrGenNodeKey(cfg.NodeKeyFile())
 	require.NoError(t, err)
 
-	ns, err := makeSeedNode(cfg,
+	ns, err := makeSeedNode(ctx,
+		cfg,
 		config.DefaultDBProvider,
 		nodeKey,
 		defaultGenesisDocProviderFunc(cfg),