[23504] Add types for the new (de)serialization methods of flat, non-primitive arrays

[Mario-DL]

Description

This PR adds the types for testing relating these PRs:

• [23504] Optimize (de)serialization of flat, non-primitive arrays Fast-CDR#274
• [23504] Optimize (de)serialization of flat, non-primitive arrays Fast-DDS-Gen#489
• [23504] Optimize (de)serialization of flat, non-primitive arrays Fast-DDS#5953

Contributor Checklist

• Commit messages follow the project guidelines.
• Any new/modified type has been properly reflected on test/feature/dynamic_types/dds_types_tests tests in a Pull Request.
• Any new/modified type has been properly updated on test/dds/xtypes tests using update_header_and_create_cases.py script in a Pull Request.
• For any new IDL file, Fast DDS update_generated_code_from_idl.sh script adding a new line in file_needing_output_dir list in a Pull Request.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.

[MiguelCompany]

I would also add an unbounded sequence of this type somewhere.