Upgrade plugin to version 2.0.0

[jacobecox]

Most recent update adds README guidance for label usage to control cloud assignment per job

Fixes:

• handle orphaned workload cleanup
• handle stalled task cleanup (job finishes but Jenkins never sees it completed after period of time)
• handle stuck agent (agent is online but no activity/stalled JVM after period of time)
• added async cleanup of agent + workload to avoid mismatches
• added agent provisioning cooldown - configurable length of time to wait before provisioning another agent for same task
• added resource minimum + recommendation guard rails (too low resources never run agents)
• specified volume set must be of type: shared

Succesful scenario handling

• Handshake failures
• OOM kills
• Fast exits
• Abnormal websocket terminations
• Controller restarts
• Stalled JVMs due to CPU overload
• Parallel job runs
• Big resource consumption (15 Core + 32 GiB) with 1 min+ timeout