* Drop SingleChannelStateSequence in favor of MultiChannelStateSequenceWithData
Most all the users were Multi* anyways, so just improve that:
1. Allow up to 8 waveforms to share one byte per timestamp. It could be better but this is simple
and gets most of the benefit.
2. Use a wrapper structure to handle reserving space for the arrays. Makes the interface simpler
and more rigid. Also saves 4 bytes per Multi*. Downside is access is now via -> and *,
not . and (nothing).
Saves 224 bytes of BSS, 1832 bytes of RAM4/CCM, 952 bytes of TEXT, and 103 bytes of RODATA
* Instantiate a base_t to make debugging easier.
Also fixes crash on real firmware by using &m_base instead - LTO optimization issue?
* No magical templated StaticAlloc thingy. Just virtual functions.
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