[EventHubs] kwargs/error testing

[swathipil]

fixes: #26229 fixes: #24846 fixes: #24680

Table of kwargs tested are in the issue above.

• Most tests added were for EventHubConsumerClient/ProducerClient constructor kwargs.
• Added tests for invalid key/policy name in the EventHubSharedKeyCredential.
• A lot of the params for send_event/send_batch were already being tested.
• receive/receive_batch kwargs seemed to pretty thoroughly tested as well.
• A few errors were caught by changing permissions/settings on the EH. (ex. Disabling the EH in the middle of receiving, Not adding the EH Data Owner Role + using AAD)
• sync consumer is not raising/handling errors correctly for retry_total > 0. This was happening in previously GA'ed versions as well, so can be addressed later. Issue created: #27137

[azure-sdk]

API change check

APIView has identified API level changes in this PR and created following API reviews.

azure-eventhub

[swathipil]

/azp run python - eventhub - tests

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[swathipil]

/azp run python - eventhub - tests

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[swathipil]

/azp run python - eventhub - tests

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[swathipil]

/azp run python - eventhub - tests

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[swathipil]

/azp run python - eventhub - tests

[azure-pipelines[bot]]

Pull request contains merge conflicts.

[swathipil]

/azp run python - eventhub - tests

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