Adds an e2e suite (e2e/remotejobs) that runs on the container harness and
exercises the two stacked PRs end-to-end against a live management server
and a real client:
- Remote-jobs opt-in (#7153): a peer that ran plain `netbird up` reports
remote_jobs_allowed=false via the peers API, and the client refuses a
streamed job ("remote jobs are not enabled on this peer"). After
`netbird up --allow-remote-jobs`, the flag flips to true on the API and
the same job is accepted for execution.
- Bundle job parameters (#7147): an unknown anonymize_level is rejected at
job creation, and a messy-but-valid value (' Strict ') is normalized to
'strict' in the stored job the API returns.
Adds a small harness helper, Client.Up(extraArgs...), to re-run
`netbird up` with flags so the opt-in can be toggled mid-test without
recreating the container.
