cloudflared: update to 2026.8.3

cloudflared: update to 2026.8.3

2026.8.3
- 2026-08-28 chore: Remove stale metrics timeout TODO
- 2026-08-28 TUN-10798: Parse Quick Tunnel allowed mail rules
- 2026-08-27 chore: Clean up unused code
- 2026-08-26 chore: bump gorilla/websocket for GO-2026-6278
- 2026-08-26 VULN-142146: Update GitLab R2 token path (cloudflared-pkgs) to protected branches
- 2026-08-26 TUN-10820: Remove test-only stdin reconnect control
- 2026-08-26 TUN-10822: Remove fetching protocol percentage from remote
- 2026-08-25 TUN-10725: Remove unused certificate configuration
- 2026-08-20 chore: Update distrolesss images in amd64

2026.8.2
- 2026-08-14 VULN-141859: Revert path normalization

2026.8.1
- 2026-08-13 VULN-141859: Fix missing trailing slash

2026.8.0
- 2026-08-12 AUTH-9041 Generate ephemeral keypair for login token transfer
- 2026-08-12 VULN-141859: Normalize request path
- 2026-08-11 TUN-10748: Add FIPS image variant for Cloudflared tunnel
- 2026-08-10 AUTH-9012 Verify Access app identity with signed metadata
- 2026-08-07 chore: Bump grpc to v.1.83.0 to fix vulnerability
- 2026-07-08 TUN-10557: Bump quic-go v0.59.1

Signed-off-by: Tianling Shen <redacted>