Fix helm chart configuration

[clamoriniere]

What does this PR do?

Update helm chart deployment:

• update container argument to match new process args introduced with the operator-sdk v1.0.0 migration.
• update liveness probe configuration and remove readiness problem.
• update metrics port.

Motivation

Update the helm chart to be compatible with the new extendeddaemonset controller process.

Additional Notes

I used kustomize config that is now used for testing as reference: https://github.com/DataDog/extendeddaemonset/blob/master/config/manager/manager.yaml

Describe your test plan

Build the extendeddaemonset docker image from master HEAD, or with RC image. deploy the extendeddaemonset controller with the helm chart. the controller should start properly.

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[codecov-commenter]

Codecov Report

Merging #44 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #44   +/-   ##
=======================================
  Coverage   37.46%   37.46%           
=======================================
  Files          29       29           
  Lines        1500     1500           
=======================================
  Hits          562      562           
  Misses        865      865           
  Partials       73       73           

Flag	Coverage Δ
#unittests	37.46% <ø> (ø)

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