Add refresh method to fake backends

[ptristan3]

Summary

Details and comments

Fixes #1707

[coveralls]

Pull Request Test Coverage Report for Build 9455558491

Details

• 13 of 48 (27.08%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.4%) to 82.05%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit_ibm_runtime/utils/backend_encoder.py	8	17	47.06%
qiskit_ibm_runtime/fake_provider/fake_backend.py	5	31	16.13%
<!--	Total:	13	48	27.08%	-->

Totals
Change from base Build 9452478202:	-0.4%
Covered Lines:	6084
Relevant Lines:	7415

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9500935091

Details

• 13 of 49 (26.53%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.4%) to 81.929%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit_ibm_runtime/utils/backend_encoder.py	8	17	47.06%
qiskit_ibm_runtime/fake_provider/fake_backend.py	5	32	15.63%
<!--	Total:	13	49	26.53%	-->

Totals
Change from base Build 9500909504:	-0.4%
Covered Lines:	6048
Relevant Lines:	7382

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9516500365

Details

• 13 of 49 (26.53%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.4%) to 81.929%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit_ibm_runtime/utils/backend_encoder.py	8	17	47.06%
qiskit_ibm_runtime/fake_provider/fake_backend.py	5	32	15.63%
<!--	Total:	13	49	26.53%	-->

Totals
Change from base Build 9504829260:	-0.4%
Covered Lines:	6048
Relevant Lines:	7382

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9568678069

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 13 of 49 (26.53%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.4%) to 81.941%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit_ibm_runtime/utils/backend_encoder.py	8	17	47.06%
qiskit_ibm_runtime/fake_provider/fake_backend.py	5	32	15.63%
<!--	Total:	13	49	26.53%	-->

Totals
Change from base Build 9568564788:	-0.4%
Covered Lines:	6053
Relevant Lines:	7387

---

💛 - Coveralls