fix: allow login with user created through v2 api without password (#8291)

# Which Problems Are Solved

User created through the User V2 API without any authentication method
and possibly unverified email address was not able to login through the
current hosted login UI.

An unverified email address would result in a mail verification and not
an initialization mail like it would with the management API. Also the
login UI would then require the user to enter the init code, which the
user never received.

# How the Problems Are Solved

- When verifying the email through the login UI, it will check for
existing auth methods (password, IdP, passkeys). In case there are none,
the user will be prompted to set a password.
- When a user was created through the V2 API with a verified email and
no auth method, the user will be prompted to set a password in the login
UI.
- Since setting a password requires a corresponding code, the code will
be generated and sent when login in.

# Additional Changes

- Changed `RequestSetPassword` to get the codeGenerator from the
eventstore instead of getting it from query.

# Additional Context

- closes https://github.com/zitadel/zitadel/issues/6600
- closes https://github.com/zitadel/zitadel/issues/8235

---------

Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

internal/command/user_v2_human_test.go

@@ -319,7 +319,7 @@ func TestCommandSide_AddUserHuman(t *testing.T) {
 			},
 		},
 		{
-			name: "add human (with initial code), ok",
+			name: "add human (email not verified, no password), ok (init code)",
 			fields: fields{
 				eventstore: expectEventstore(
 					expectFilter(),
@@ -389,7 +389,7 @@ func TestCommandSide_AddUserHuman(t *testing.T) {
 			},
 		},
 		{
-			name: "add human (with password and initial code), ok",
+			name: "add human (email not verified, with password), ok (init code)",
 			fields: fields{
 				eventstore: expectEventstore(
 					expectFilter(),
@@ -459,6 +459,65 @@ func TestCommandSide_AddUserHuman(t *testing.T) {
 				wantID: "user1",
 			},
 		},
+		{
+			name: "add human (email not verified, no password, no allowInitMail), ok (email verification with passwordInit)",
+			fields: fields{
+				eventstore: expectEventstore(
+					expectFilter(),
+					expectFilter(
+						eventFromEventPusher(
+							org.NewDomainPolicyAddedEvent(context.Background(),
+								&user.NewAggregate("user1", "org1").Aggregate,
+								true,
+								true,
+								true,
+							),
+						),
+					),
+					expectPush(
+						newAddHumanEvent("", false, true, "", language.English),
+						user.NewHumanEmailCodeAddedEventV2(context.Background(),
+							&user.NewAggregate("user1", "org1").Aggregate,
+							&crypto.CryptoValue{
+								CryptoType: crypto.TypeEncryption,
+								Algorithm:  "enc",
+								KeyID:      "id",
+								Crypted:    []byte("emailverify"),
+							},
+							1*time.Hour,
+							"",
+							false,
+							"",
+						),
+					),
+				),
+				checkPermission: newMockPermissionCheckAllowed(),
+				idGenerator:     id_mock.NewIDGeneratorExpectIDs(t, "user1"),
+				newCode:         mockEncryptedCode("emailverify", time.Hour),
+			},
+			args: args{
+				ctx:   context.Background(),
+				orgID: "org1",
+				human: &AddHuman{
+					Username:  "username",
+					FirstName: "firstname",
+					LastName:  "lastname",
+					Email: Email{
+						Address: "email@test.ch",
+					},
+					PreferredLanguage: language.English,
+				},
+				secretGenerator: GetMockSecretGenerator(t),
+				allowInitMail:   false,
+				codeAlg:         crypto.CreateMockEncryptionAlg(gomock.NewController(t)),
+			},
+			res: res{
+				want: &domain.ObjectDetails{
+					ResourceOwner: "org1",
+				},
+				wantID: "user1",
+			},
+		},
 		{
 			name: "add human (with password and email code custom template), ok",
 			fields: fields{
@@ -609,7 +668,7 @@ func TestCommandSide_AddUserHuman(t *testing.T) {
 			},
 		},
 		{
-			name: "add human email verified, ok",
+			name: "add human email verified and password, ok",
 			fields: fields{
 				eventstore: expectEventstore(
 					expectFilter(),
@@ -1084,8 +1143,9 @@ func TestCommandSide_AddUserHuman(t *testing.T) {
 				},
 				wantID: "user1",
 			},
-		}, {
-			name: "add human (with return code), ok",
+		},
+		{
+			name: "add human (with phone return code), ok",
 			fields: fields{
 				eventstore: expectEventstore(
 					expectFilter(),