Automate fuzz test batch generation

[jouho]

Problem:

Currently, the scheduled fuzz test job generates a batch by manually listing all test names. This approach is inefficient because it requires manual updates whenever new fuzz tests are added. We should instead dynamically generate the batch list.

Solution:

Modify the process to dynamically generate the batch list based on the existing fuzz test files. This likely involves making changes to buildspec_fuzz_scheduled.yml.

Requirements / Acceptance Criteria:

• Ensure s2nFuzzBatchScheduled runs successfully on CodeBuild.
• Confirm that any new fuzz tests are automatically included in the batch during its execution.