Fix open circles drawing incorrectly in mpl drawer and up visual circuit tests to .9999 accuracy

[enavarro51]

Summary

Fixes a problem where open circles were drawing incorrectly in mpl circuit drawer and ups the visual circuit tests to .9999 accuracy

Details and comments

A bug in the drawing of open circles for conditional gates was introduced in #10504. Circles would be drawn closed when the value was 0. The auto visual circuit tests did not detect this problem due to the accuracy being set at 99%. This also changes that accuracy to 99.99%.

[qiskit-bot]

One or more of the the following people are requested to review this:

• @enavarro51
• @Qiskit/terra-core

[coveralls]

Pull Request Test Coverage Report for Build 5789710694

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• 6 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.02%) to 87.262%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit/visualization/circuit/matplotlib.py	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/expr.rs	1	93.76%
qiskit/extensions/quantum_initializer/squ.py	2	80.0%
crates/qasm2/src/lex.rs	3	91.65%

Totals
Change from base Build 5787606820:	0.02%
Covered Lines:	74260
Relevant Lines:	85100

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💛 - Coveralls

[jakelishman]

Thanks for this Edwin. Let's try the visual tests with 0.9999 fidelity comparisons for now; if CI proves to be too flaky at that level, we can see if we can come up with something a bit more robust.