Changed AMQP message receive model to require explicit delivery accept/reject.

[LarryOsterman]

Updated the infrastructure for receiving AMQP messages to require that message deliveries be explicitly accepted or rejected - this is not needed for Eventhubs but will be a requirement for ServiceBus.

This PR also includes an enhancement to the AMQP receiver to set and retrieve the link credit mode - this will almost certainly be needed to implement batch receive.

Please note that much of this infrastructure is not currently tested (and almost certainly doesn't work correctly) because we don't have full live test support.

This PR also includes the start of tests for AMQP connection APIs. but this functionality is disabled because we don't have CI pipeline support for starting the test AMQP broker.

Bonus gratuitous changes: I removed the word "test" from a number of test functions because it's redundant.

CoPilot summary:

This pull request includes several changes to the azure_core_amqp package, focusing on improving the handling of AMQP deliveries and enhancing the test infrastructure. The changes introduce new structs and traits for better abstraction and add new methods to existing traits. Additionally, some tests have been disabled temporarily until the CI environment can support them.

Improvements to AMQP delivery handling:

• Introduced Fe2o3AmqpDelivery struct and implemented AmqpDeliveryApis trait for it in sdk/core/azure_core_amqp/src/fe2o3/messaging/messaging_types.rs.
• Added AmqpDelivery struct and AmqpDeliveryApis trait in sdk/core/azure_core_amqp/src/messaging.rs to abstract delivery handling.

Enhancements to AMQP receiver:

• Added methods for setting and getting credit mode, and handling delivery acceptance, rejection, and release in sdk/core/azure_core_amqp/src/fe2o3/receiver.rs. [1] [2]
• Updated AmqpReceiverApis trait to include new delivery-related methods in sdk/core/azure_core_amqp/src/receiver.rs. [1] [2]

Test infrastructure improvements:

• Disabled certain tests in sdk/core/azure_core_amqp/src/connection.rs until the AMQP test broker can be started in CI.
• Renamed test functions for consistency in sdk/core/azure_core_amqp/src/connection.rs. [1] [2]

Additional changes:

• Added tokio as a dev dependency in sdk/core/azure_core_amqp/Cargo.toml.
• Updated imports and logging levels in sdk/core/azure_core_amqp/src/fe2o3/connection.rs.

These changes collectively enhance the robustness and maintainability of the azure_core_amqp package.

[heaths]

I have a couple of suggestions, but otherwise LGTM.