Do not mount /etc/passwd on Talos nodes

[aureleoules]

What does this PR do?

A brief description of the change being made with this pull request.

Disable mounting /etc/passwd in node agent containers for Talos nodes.

Tested with:

kind: "DatadogAgent"
spec:
  ...
  features:
    logCollection:
      enabled: true
      containerCollectAll: true
    orchestratorExplorer:
      enabled: true
    liveProcessCollection:
      enabled: true

# operator values.yaml
introspection:
  enabled: true # required to detect talos

Motivation

What inspired you to submit this pull request?

DataDog/helm-charts#273 (comment)

Additional Notes

Anything else we should know when reviewing?

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

Describe your test plan

Write there any instructions and details you may have to test your PR.

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 96.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 49.47%. Comparing base (54ed549) to head (c2abbce).
Report is 148 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/kubernetes/provider.go	85.71%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1765   +/-   ##
=======================================
  Coverage   49.47%   49.47%           
=======================================
  Files         219      219           
  Lines       21356    21359    +3     
=======================================
+ Hits        10565    10568    +3     
  Misses      10245    10245           
  Partials      546      546           

Flag	Coverage Δ
unittests	49.47% <96.66%> (+<0.01%)	⬆️

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

Files with missing lines	Coverage Δ
...al/controller/datadogagent/feature/cspm/feature.go	75.20% <100.00%> (ø)
...nal/controller/datadogagent/feature/cws/feature.go	79.55% <100.00%> (ø)
...roller/datadogagent/feature/liveprocess/feature.go	92.07% <100.00%> (ø)
...r/datadogagent/feature/processdiscovery/feature.go	90.00% <100.00%> (ø)
pkg/kubernetes/provider.go	84.82% <85.71%> (+0.41%)	⬆️

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