Remove create strategy

[khewonc]

What does this PR do?

Remove create strategy since it is not used internally, which was the main use case for this.
Original PR: #1365 (it was renamed after this)

Motivation

https://datadoghq.atlassian.net/browse/AGENTONB-2600

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

Test that DAPs still work properly on a local cluster: https://github.com/DataDog/datadog-operator/blob/main/docs/datadog_agent_profiles.md

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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.01%. Comparing base (9a933b7) to head (c14e23a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2255      +/-   ##
==========================================
- Coverage   39.10%   39.01%   -0.10%     
==========================================
  Files         254      254              
  Lines       26329    26195     -134     
==========================================
- Hits        10297    10219      -78     
+ Misses      15418    15368      -50     
+ Partials      614      608       -6     

Flag	Coverage Δ
unittests	39.01% <100.00%> (-0.10%)	⬇️

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

Files with missing lines	Coverage Δ
...controller/datadogagent/controller_reconcile_v2.go	56.96% <100.00%> (-0.18%)	⬇️
...ler/datadogagent/controller_reconcile_v2_common.go	32.62% <ø> (-1.21%)	⬇️
pkg/agentprofile/agent_profile.go	77.18% <100.00%> (+5.15%)	⬆️
pkg/agentprofile/status.go	72.91% <ø> (+8.44%)	⬆️

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