Relations inside more than one nested embedded with select throws error

[mohaalak]

Issue description

if you have more than one embeded nested in each other and in the nested embeded and you select it it will throw error that it cannot find the selection.

Expected Behavior

@Entity()
export class Image {
  @PrimaryGeneratedColumn()
  id!: number;

  @Column()
  title!: string;

  @Column()
  file!: string;
}

class Media {
  @ManyToMany(() => Image)
  @JoinTable()
  images!: Image[];
}

class Body {
  @Column()
  text!: string;

  @Column(() => Media)
  media!: Media;
}
@Entity()
export class Post {
  @PrimaryGeneratedColumn()
  id!: number;

  @Column()
  title!: string;

  @Column(() => Body)
  body!: Body;
}


async function init() {
  const AppDataSource = new DataSource({
    type: "sqlite",
    database: "test.sqlite",
    synchronize: true,
    entities: [Image, Post],
    logging: true,
    migrations: [],
  });

  await AppDataSource.initialize();

  const postRepo = AppDataSource.getRepository(Post);

  await postRepo.find({
    relations: {
      body: {
        media: {
          images: true,
        },
      },
    },
    select: {
      title: true,
      body: {
        media: {
          images: true,
        },
      },
    },
  });
}

init();

this should work and return an empty array.

Actual Behavior

but it will raise an error

~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/util/OrmUtils.ts:225
            obj = obj[segments[i]]
                     ^
TypeError: Cannot read properties of undefined (reading 'media')
    at Function.deepValue (~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/util/OrmUtils.ts:225:22)
    at ~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/query-builder/SelectQueryBuilder.ts:3938:36
    at Array.forEach (<anonymous>)
    at SelectQueryBuilder.buildRelations (~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/query-builder/SelectQueryBuilder.ts:3924:32)
    at ~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/query-builder/SelectQueryBuilder.ts:3935:22
    at Array.forEach (<anonymous>)
    at SelectQueryBuilder.buildRelations (~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/query-builder/SelectQueryBuilder.ts:3924:32)
    at SelectQueryBuilder.applyFindOptions (~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/query-builder/SelectQueryBuilder.ts:3113:22)
    at SelectQueryBuilder.setFindOptions (~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/query-builder/SelectQueryBuilder.ts:105:14)
    at EntityManager.find (~/typeorm_test/node_modules/.pnpm/typeorm@0.3.20_sqlite3@5.1.6_ts-node@10.9.1/node_modules/src/entity-manager/EntityManager.ts:1104:14)
    ```

### Steps to reproduce

you can copy paste the whole code from expected behaviour.

### My Environment


| Operating System    |          |
| Node.js version     | 18.19.0  |
| Typescript version  | 5.0.4 |
| TypeORM version     | 0.3.20 |


### Additional Context

_No response_

### Relevant Database Driver(s)

- [ ] aurora-mysql
- [ ] aurora-postgres
- [ ] better-sqlite3
- [ ] cockroachdb
- [ ] cordova
- [ ] expo
- [ ] mongodb
- [ ] mysql
- [ ] nativescript
- [ ] oracle
- [ ] postgres
- [ ] react-native
- [ ] sap
- [ ] spanner
- [ ] sqlite
- [ ] sqlite-abstract
- [ ] sqljs
- [ ] sqlserver

### Are you willing to resolve this issue by submitting a Pull Request?

Yes, I have the time, and I know how to start.