Deprecate opentracing

[rikatz]

What this PR does / why we need it:

As part of our code cleanup, we are deprecating opentracing, zipkin, jaeger, datadog collectors and keeping only Opentelemetry.

This PR is the initial one that removes the whole code from the controller.

Next we should remove this modules from the NGINX base image, but eventually generate a new image/copy, as we may need to cherry pick bugfixes and the image should still contain Opentracing for it

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

cc @dgoffredo @esigo

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[rikatz]

/hold

[cpanato]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, rikatz, tao12345666333

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[rikatz]

/hold cancel