Remove use of BackendProperties (BackendV1) in UnitarySynthesis pass

[ElePT]

Summary

This PR includes:

• Test upgrade -> Upgrade of class unit tests to avoid use of Backend V1. Some tests were also modified to use target instead of basis_gates, as the functionality they were testing was dependant of the backend_props input (deprecated)
• Removal -> Removed the backend_props argument from UnitarySynthesis, as it relied on the deprecated BackendProperties class. The argument itself was never deprecated, so it might be necessary to open a deprecation PR against 1.4.

Note that this PR touches on code that is currently actively worked on in:

• Update transpiler pipeline to (only) use target internally #12850
• Add 2q fractional gates to the UnitarySynthesis tranpiler pass #13568
• Oxidize UnitarySynthesis path using basis_gates #13704

And there will be conflicts.

Details and comments

[coveralls]

Pull Request Test Coverage Report for Build 12890078963

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.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 6 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• 21 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.009%) to 88.946%

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Files with Coverage Reduction	New Missed Lines	%
crates/accelerate/src/unitary_synthesis.rs	1	93.33%
crates/qasm2/src/lex.rs	4	91.98%
crates/qasm2/src/parse.rs	6	97.15%
qiskit/transpiler/passes/synthesis/unitary_synthesis.py	10	56.17%

Totals
Change from base Build 12888875366:	0.009%
Covered Lines:	79404
Relevant Lines:	89272

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💛 - Coveralls

[qiskit-bot]

One or more of the following people are relevant to this code:

• @Qiskit/terra-core

[ElePT]

Marked as on hold to make sure I have a 1.4 deprecation ready before merging this PR.

[ElePT]

No longer on hold after #13719