Dynamic loop insertion

[terrorfisch]

• New function qupulse._program._loop.roll_constant_waveforms that can transform long constant waveforms into repetitions of shorter waveforms.
• The sample rate of HDAWG playbacks can now be dynamically reduced. Currently this can be enabled with the class attribute qupulse._program.seqc.WaveformPlayback.ENABLE_DYNAMIC_RATE_REDUCTION. Automatically use reduced sample for HDAWG #622

Tests pass

Todo:

• newspiece for towncier

[coveralls]

Pull Request Test Coverage Report for Build 2426

• 68 of 71 (95.77%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 80.808%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qupulse/_program/volatile.py	3	4	75.0%
qupulse/_program/seqc.py	34	36	94.44%

Totals
Change from base Build 2420:	0.1%
Covered Lines:	7611
Relevant Lines:	9230

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💛 - Coveralls

[terrorfisch]

I have not yet found the intended way to link the github actions test result here, but there the tests pass.

https://github.com/qutech/qupulse/runs/4242052498