Multiple BN HTTP resolver (#13433)

* http resolver

* Redo

* Revert "Redo"

This reverts commit 5437c44ac2.

* Revert "http resolver"

This reverts commit 206207b530.

* Add host change to ValidatorClient + Validator

* Update mockgen

* Tidy

* Add mock validator

* Update gomock

* Gaz

* Solve interface issues

* Fix host

* Fix test

* Add tests

* Add endpoint change log

* Fix log

* Gen mock

* Fix test

* Fix deepsource

* Lint + deepsource

* Move to healthCheckRoutine

* Fix build errors

* Switch host to string

* Forgot a couple

* Radek' review

* Add PushProposerSettings to goroutine

* Radek' review

* James' review + test fix

* Radek' suggestion

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Check if new node is healthy

* Fix linter errors

* Add host switch logic to ChangeHost

* Lint + comment

* Fix messy merge

* rename ChangeHost to SetHost

* improve log

* remove log

* switch one node

* rename param

---------

Co-authored-by: Radosław Kapka <rkapka@wp.pl>
Co-authored-by: rkapka <radoslaw.kapka@gmail.com>

validator/accounts/cli_manager.go

@@ -87,7 +87,10 @@ func (acm *CLIManager) prepareBeaconClients(ctx context.Context) (*iface.Validat
 		acm.beaconApiTimeout,
 	)
 
-	restHandler := beaconApi.NewBeaconApiJsonRestHandler(http.Client{Timeout: acm.beaconApiTimeout}, acm.beaconApiEndpoint)
+	restHandler := beaconApi.NewBeaconApiJsonRestHandler(
+		http.Client{Timeout: acm.beaconApiTimeout},
+		acm.beaconApiEndpoint,
+	)
 	validatorClient := validatorClientFactory.NewValidatorClient(conn, restHandler)
 	nodeClient := nodeClientFactory.NewNodeClient(conn, restHandler)
 

validator/accounts/testing/mock.go

@@ -249,3 +249,11 @@ func (*Validator) EventStreamIsRunning() bool {
 func (*Validator) HealthTracker() *beacon.NodeHealthTracker {
 	panic("implement me")
 }
+
+func (*Validator) Host() string {
+	panic("implement me")
+}
+
+func (*Validator) ChangeHost() {
+	panic("implement me")
+}