[MM-57942] Fix a panic on password is too long (#27449)

* return error from bcrypt, handle gracefully; remove dead code

* linting

* linting

* i18n

* fix test

* fill out translations

server/channels/store/sqlstore/user_store.go

@@ -112,7 +112,9 @@ func (us SqlUserStore) Save(rctx request.CTX, user *model.User) (*model.User, er
 		return nil, store.NewErrInvalidInput("User", "id", user.Id)
 	}
 
-	user.PreSave()
+	if err := user.PreSave(); err != nil {
+		return nil, err
+	}
 	if err := user.IsValid(); err != nil {
 		return nil, err
 	}

server/channels/store/storetest/user_store.go

@@ -12,6 +12,8 @@ import (
 	"testing"
 	"time"
 
+	"golang.org/x/crypto/bcrypt"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
@@ -2294,7 +2296,11 @@ func testUserStoreUpdatePassword(t *testing.T, rctx request.CTX, ss store.Store)
 	_, nErr := ss.Team().SaveMember(rctx, &model.TeamMember{TeamId: teamId, UserId: u1.Id}, -1)
 	require.NoError(t, nErr)
 
-	hashedPassword := model.HashPassword("newpwd")
+	_, err = model.HashPassword(strings.Repeat("1234567890", 8))
+	require.ErrorIs(t, err, bcrypt.ErrPasswordTooLong)
+
+	hashedPassword, err := model.HashPassword("newpwd")
+	require.NoError(t, err)
 
 	err = ss.User().UpdatePassword(u1.Id, hashedPassword)
 	require.NoError(t, err)