Enhance usage plugin

[gj409237405]

solve #3042

First optimize the usage plugin configuration of Volcano.
before that

• name: usage
  arguments:
  thresholds:
  CPUUsageAvg.5m: 80
  MEMUsageAvg.5m: 90

after that

name: usage
arguments:
usage.weight: 10
type: average
thresholds:
cpu: 70
mem: 70
period: 10m

Second, make it easier for users to use the usage plugin
before
You must first define the rules of Pro, as follows

groups:

name: cpu_mem_usage_active
interval: 30s
rules:
    record: mem_usage_active
    expr: 100*(1-node_memory_MemAvailable_bytes/node_memory_MemTotal_bytes)
name: cpu-usage-1m
interval: 1m
rules:
    record: cpu_usage_avg_5m
    expr: 100 - (avg by (instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100)
name: mem-usage-1m
interval: 1m
rules:
    record: mem_usage_avg_5m
    expr: avg_over_time(mem_usage_active[5m])

after that
You don't need to define general rules, you can use the usage plugin directly

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