Fix for nightly tests failing on Python 3.10

[Gavinok]

Before the recent support for nightly release tests for Python 3.10 (see the logs here) were broken this fix corrected the tests by simply replacing async_case with the original unittest library.

A similar issue was resolved for the same incompatibility in #2187

As async_case was simply a backport of functionality included since Python 3.8 and acapy supports Python 3.9+ there is no longer a need for async_case.

Finally, this means we also restore the functionality of 2 additional tests that were previously skipped in #2187

Including Tests as a Dependency for Nightly Releases

In addition, the current release does not check that the tests for Python 3.10 were successful before building a nightly release. This PR also adds this as a dependency.

Additional context

The current source of the error with Python 3.10 is due to async_case using

            loop.run_until_complete(
                asyncio.gather(*to_cancel, loop=loop, return_exceptions=True))

as of Python 3.10 the loop keyword has been depreciated in asyncio.gather.

This leads to the following exception

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[swcurran]

Looks good to me, but I think it better that @dbluhm or @usingtechnology review, approve and merge this.

Thanks!

[dbluhm]

LGTM