Set _active flag to false if session already closed

[kt474]

Summary

If the session created with from_id is already closed, jobs should be rejected immediately.

Details and comments

Fixes #1597

[coveralls]

Pull Request Test Coverage Report for Build 9716475964

Details

• 2 of 3 (66.67%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.006%) to 82.076%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit_ibm_runtime/session.py	2	3	66.67%
<!--	Total:	2	3	66.67%	-->

Totals
Change from base Build 9715853171:	-0.006%
Covered Lines:	6113
Relevant Lines:	7448

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💛 - Coveralls