[24094] Change resource limits default values

[MiguelCompany]

Description

This changes the documentation regrarding the default values of max_samples, max_instances, and max_samples_per_instance.

It also clarifies the behavior on topics without keys, and that allocated_samples is limited by max_samples

It would be nice to backport commits d70aaca and 8792629

Related implementation PR:

• [24094] Force history QoS consistency and change resource limits default values Fast-DDS#6261

Contributor Checklist

• Commit messages follow the project guidelines.
• Code snippets related to the added documentation have been provided.
• Documentation tests pass locally.
• N/A: The Pro version badge has been added if the documented feature is exclusive to Fast DDS Pro.
• Applicable backports have been included in the description.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.
• CI passes without warnings or errors.

[raulojeda22]

LGTM