[dca] add daemonsets list/watch for the cluster-agent

[nammn]

What does this PR do?

Adds the daemonsets rbac rules. We already define them here:

datadog-operator/controllers/datadogagent/clusteragent.go

Lines 1270 to 1272 in 6a0a733

	datadoghqv1alpha1.DaemonsetsResource,
	},
	Verbs: []string{datadoghqv1alpha1.GetVerb},

. But they are only support GET while for the orchestrator explorer we need LIST and WATCH as well.

Related agent PR: DataDog/datadog-agent#8119 (collects daemonsets on the DCA)

Motivation

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Additional Notes

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[codecov-commenter]

Codecov Report

Merging #314 (6a0a733) into main (023cb3b) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #314   +/-   ##
=======================================
  Coverage   58.18%   58.18%           
=======================================
  Files          59       59           
  Lines        6294     6294           
=======================================
  Hits         3662     3662           
  Misses       2362     2362           
  Partials      270      270           

Flag	Coverage Δ
unittests	58.18% <100.00%> (ø)

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

Impacted Files	Coverage Δ
controllers/datadogagent/clusteragent.go	69.35% <100.00%> (ø)

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