[20630] Use correct version of GTest on DS ASan tests

[EduPonz]

Description

#4558 Corrected the GTest version used for Fast DDS ASan tests, but did not do so for the Discovery Server tests job. This PR fixes that.

Fix already included in:

• 2.13.x: [20542] Pin CMake version and vm.mmap_rnd_bits in sanitizer workflows (backport #4558) #4566
• 2.12.x: [20542] Pin CMake version and vm.mmap_rnd_bits in sanitizer workflows (backport #4558) #4567
• 2.10.x: [20542] Pin CMake version and vm.mmap_rnd_bits in sanitizer workflows (backport #4558) #4568
• 2.6.x: [20542] Pin CMake version and vm.mmap_rnd_bits in sanitizer workflows (backport #4558) #4569

Contributor Checklist

• Commit messages follow the project guidelines.
• N/A: The code follows the style guidelines of this project.
• N/A: Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally
• N/A: Any new/modified methods have been properly documented using Doxygen.
• N/A: Changes are ABI compatible.
• N/A: Changes are API compatible.
• N/A: New feature has been added to the versions.md file (if applicable).
• N/A: New feature has been documented/Current behavior is correctly described in the documentation.
• 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.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.

[JesusPoderoso]

LGTM