Add sample frequency to segment container
*Created by: sldesnoo-Delft*
When sample frequency is set on segment container then this value should overrule the sample frequency set on the sequence.
When the AWG waveform uploader detects a change in frequency between segments, then it creates a new waveform which will automatically start after the previous one.
The waveform uploader must pad every waveform to a multiple of 10 samples (Keysight AWG requirement). It should log the number of inserted samples. The uploader should also store information about the generated wave in a user accessible waveform info attribute.
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