net/gitlab-agent: update to 16.0.1

Required for gitlab-ce 16.0.0

Changelog:
https://gitlab.com/gitlab-org/cluster-integration/gitlab-agent/-/commits/master

This release also includes patches to fix the issue:
https://github.com/open-telemetry/opentelemetry-go/issues/4076
https://github.com/open-telemetry/opentelemetry-go/pull/4077

Reported upstream here:
gitlab-org/cluster-integration/gitlab-agent#410