[eventhub] - Move tracing spec to internal

[maorleger]

Packages impacted by this PR

event-hubs

Issues associated with this PR

Fixes #21226

Describe the problem that is addressed by this PR

The tracing client test adds an internal reference; however, the test is still
not excluded during min/max due to the nesting of the tracing reference. That
will be fixed separately, but it also makes sense to make this an internal test
as it tests the internals of how we trace.

What are the possible designs available to address the problem? If there are more than one possible design, why was the one in this PR chosen?

Are there test cases added in this PR? (If not, why?)

N/A

Provide a list of related PRs (if any)

Command used to generate this PR: (Applicable only to SDK release request PRs)

Checklists

• Added impacted package name to the issue description.
• Does this PR need any fixes in the SDK Generator?** (If so, create an Issue in the Autorest/typescript repository and link it here.)
• Added a changelog (if necessary).

[azure-sdk]

API change check for @azure/event-hubs

API changes are not detected in this pull request for @azure/event-hubs

[deyaaeldeen]

I wouldn't claim I understand the internals of the test but looks good to me at a high level! One thing for me to look at is whether it is really nodejs-only.