allow emails without a tld (#2762)

It's perfectly valid to have an email address without a TLD, for instance:

- test@localhost
- test@svc-in-same-k8s-namespace
- test@internal-corp

Fixes #2667

server/src/domain/user/dto/create-user.dto.ts

@@ -3,7 +3,7 @@ import { IsEmail, IsNotEmpty, IsOptional, IsString } from 'class-validator';
 import { toEmail, toSanitized } from '@app/immich/utils/transform.util';
 
 export class CreateUserDto {
-  @IsEmail()
+  @IsEmail({ require_tld: false })
   @Transform(toEmail)
   email!: string;
 
@@ -29,7 +29,7 @@ export class CreateAdminDto {
   @IsNotEmpty()
   isAdmin!: true;
 
-  @IsEmail()
+  @IsEmail({ require_tld: false })
   @Transform(({ value }) => value?.toLowerCase())
   email!: string;
 
@@ -44,7 +44,7 @@ export class CreateAdminDto {
 }
 
 export class CreateUserOAuthDto {
-  @IsEmail()
+  @IsEmail({ require_tld: false })
   @Transform(({ value }) => value?.toLowerCase())
   email!: string;