Fix failing unit tests, fail on deprecation warning qiskit/main

[kt474]

We run our unit tests on a nightly cron job again the main branch of qiskit (terra)

• check/fix all failing tests
• check/fix all deprecation warnings - we should also fail the test on deprecation warning

cc @1ucian0 @drew-distefano

[kt474]

Reopening because 2 tests are still failing

One test failing

https://github.com/Qiskit/qiskit-ibm-runtime/actions/runs/6263642457/job/17008487156#step:5:839

test_coder_qc

NotImplementedError: This gate class <class 'qiskit.circuit.library.standard_gates.h.HGate'> does not support manually setting a condition on an instance. Instead you must set the label when instantiating a new object or via the .c_if() method

Update: this will be fixed by Qiskit/qiskit-ibm-provider#736

[drew-distefano]

@kt474 please investigate (and implement?) alerts via slack or other method on failing tests so we don't have to manually check the results every day

[kt474]

@kt474 please investigate (and implement?) alerts via slack or other method on failing tests so we don't have to manually check the results every day

Set up email alerts for failing tests, now just need to fail on deprecation warnings