add await to async test asserts

[stormbringer766]

add missing await to async test asserts causing build failure.

[IEvangelist]

This is awesome, thank you for this contribution @stormbringer766 - any chance we could get all the tests to pass?

[IEvangelist]

@all-contributors please add @stormbringer766 for tests.

[allcontributors]

@IEvangelist

@stormbringer766 already contributed before to test

[stormbringer766]

@IEvangelist not sure this is the way you want this fixed. There were a couple of issues.

1. The client is Lazy so wasn't actually being created in the test so wasn't being disposed.
2. The actual exception is a CosmosObjectDisposedException which is internal so can't be asserted.

Not sure what is up with CodeQL

Error: Code Scanning could not process the submitted SARIF file:
CodeQL analyses from advanced configurations cannot be processed when the default setup is enabled