ci: add copyright header to build preset requirements (TRI-1654)

[akhilraj9]

Summary

qa/L2_build_presets/requirements.txt was merged without the required NVIDIA
copyright header, which fails the nightly L0_copyrights job. This adds it.

Root cause

qa/common/check_copyright.py runs nightly across the whole repo and requires
every file to start with the NVIDIA copyright header. This file started with
distro, so the checker failed:

incorrect prefix for copyright line, allowed prefixes '# ' or '// ',
for qa/L2_build_presets/requirements.txt: distro

Fix

Prepend the standard #-prefixed BSD copyright header (2026) to the file.

Testing

python3 qa/common/check_copyright.py --year=2026 *

→ exit 0, no violations.

[greptile-apps]

Greptile Summary

Adds the required NVIDIA copyright and BSD license header to the build-preset requirements file so it complies with the repository copyright check.

• Prepends a comment-only 2026 copyright and license block.
• Leaves all dependency declarations unchanged.

Confidence Score: 5/5

The PR appears safe to merge because it only adds a valid comment header and leaves dependency behavior unchanged.

The added lines are comments accepted by requirements-file syntax, while the existing distro, pytest, and requests declarations remain unchanged.

Important Files Changed

Filename	Overview
qa/L2_build_presets/requirements.txt	Adds the standard comment-prefixed copyright header without changing package requirements or installation behavior.

_{Reviews (1): Last reviewed commit: "ci: add copyright header to build preset..." | Re-trigger Greptile}