Single-register arithmetic gates #13371
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no support for parameter expressions for now
some tests miss, some HLS tests fail (maybe Sasha's PR fixes this)
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Summary
Part of #13046: Gates for the single-register arithmetic operations.
Details and comments
I'm opening this PR for people to have a look and for more HLS test cases, but this can probably use some more cleanup. Also all the piecewise gates need an auxiliary qubit, which is currently part of the Gate
num_qubitsbut probably shouldn't be and instead be handled by a synthesis plugin.Since there's already enough for 1.3 I'd suggest we don't include this.