DRAFT: DynamicDataHelper::print can print Sequences as well as Arrays

[willstott101]

Description

Sequence dynamic data types were indexed in the same way as fixed-length arrays in the DynamicDataHelper.

@Mergifyio backport (branch/2.7.x)
@Mergifyio backport (branch/2.6.x)
Maybe more...

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added.
• Any new/modified methods have been properly documented using Doxygen.
• Fast DDS test suite has been run locally.
• Changes are ABI compatible.
• Changes are API compatible.
• Documentation builds and tests pass locally.
• New feature has been added to the versions.md file (if applicable).
• New feature has been documented/Current behavior is correctly described in the documentation.

Reviewer Checklist

• Check contributor checklist is correct.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.

I'm leaving this as a draft until I've completed the extensive checklist... might be worth noting that I can't find any tests for this Helper at all atm - do I need to create some to get this merged?

[methylDragon]

Is this still a draft? In the absence of tests for DynamicDataHelper, this would be very nice to get in for convenient printing of dynamic data

I've tested the fix locally, and it fixes the issues as expected.

[MiguelCompany]

Closing in favor of #2957, where the changes here have been included