handlers: always return pagination parameters in list (#4373)

* handlers/targets: always return pagination parameters in list

* handlers/authmethods: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/accounts: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/authtokens: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/credentiallibraries: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/credentials: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/credentialstores: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/groups: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/host_catalogs: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/host_sets: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/hosts: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/managed_groups: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/roles: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/scopes: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/sessions: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

* handlers/users: test for pagination parameters

Note that this already always returned the pagination parameters,
but now we have a test that it does so.

internal/daemon/controller/handlers/authmethods/authmethod_service.go

@@ -189,10 +189,6 @@ func (s Service) ListAuthMethods(ctx context.Context, req *pbs.ListAuthMethodsRe
 	if err != nil {
 		return nil, err
 	}
-	// If no scopes match, return an empty response
-	if len(scopeIds) == 0 {
-		return &pbs.ListAuthMethodsResponse{}, nil
-	}
 
 	var filterItemFn func(ctx context.Context, item auth.AuthMethod) (bool, error)
 	switch {