AWS Node Termination Handler v1.8.0

Features:

1. Support for webhook templates (#253 thanks to @supasteev0 )
2. Improved logs
   • Better support of JSON logging
   • Log all pods when a node is cordoned (#257 thanks to @wanwenli )
   • Reduced log clutter from new events

Other Changes:

1. Upgraded Amazon EC2 Metadata Mock version to 1.6
2. Additional retries to improve stability
   • For IMDSv2 401 errors (#244 thanks to @DP19 )
   • For uncordoning nodes (#257 thanks to @nithu0115 )
3. New documentation on simulating interruptions with AEMM