feat: Separate Node Collector and Scan Job Affinity

[charleshu-8]

Description

Add nodeCollector.Affinity field to Helm values.yaml and separate affinity setting for node collectors from scan jobs.

Related issues

• Close Separate node collector and job scan affinity #2834

Checklist

• I've read the guidelines for contributing to this repository.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[CLAassistant]

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