apis: add default PriorityClass and QoSClass, revise batch resource calculation

[saintube]

…yclass and qosclass

Ⅰ. Describe what this PR does

• koord-manager: revise batch resource calculation, identifying the pods' priorityclasses.
• koord-manager: fix a bug where the noderesource-plugin arg allows no plugin by default.
• util: add default PriorityClass and QoSClass when any of them is missing.

Ⅱ. Does this pull request fix one issue?

Fixes #1441.

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[saintube]

/hold for UTs

[codecov]

Codecov Report

Patch coverage: 75.75% and project coverage change: -0.05 ⚠️

Comparison is base (b288455) 64.14% compared to head (a88f244) 64.09%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1446      +/-   ##
==========================================
- Coverage   64.14%   64.09%   -0.05%     
==========================================
  Files         341      341              
  Lines       34944    34939       -5     
==========================================
- Hits        22415    22395      -20     
- Misses      10879    10893      +14     
- Partials     1650     1651       +1     

Flag	Coverage Δ
unittests	64.09% <75.75%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...controller/noderesource/noderesource_controller.go	30.00% <0.00%> (ø)
pkg/util/pod_qos_utils.go	60.00% <ø> (ø)
...oller/noderesource/plugins/batchresource/plugin.go	69.61% <92.30%> (-0.17%)	⬇️
pkg/koordlet/resmanager/cgroup_reconcile.go	85.53% <100.00%> (-0.39%)	⬇️

... and 2 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[saintube]

/unhold

[eahydra]

/lgtm

[eahydra]

/lgtm

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hormes

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• apis/OWNERS [hormes]
• pkg/koordlet/OWNERS [hormes]
• pkg/slo-controller/OWNERS [hormes]
• pkg/util/OWNERS [hormes]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment