EstimatorV2 jobs are not async

[nonhermitian]

Informations

• Qiskit Aer version: latest
• Python version:
• Operating system:

What is the current behavior?

The EstimatorV2 run call waits for results to come back in the main Python thread, thus blocking any further work.

Steps to reproduce the problem

Any call to EstimatorV2

What is the expected behavior?

Calls to run return a job, but otherwise do not block the main process.

Suggested solutions

Remove the internal calls that wait on the results