Enable Start to End Lazy Loaded / Delayed Computation for compute_Sv

[ctuguinay]

From the conversation regarding the merged PR #1302, it's clear that a user cannot run a fully delayed compute_Sv on EK80 Broadband Complex data, and having a fully delayed compute_Sv would be very nice since it allows further scalability.

The following tasks are needed to make this happen:

• Check the status of EK60 and EK80 CW data calibration: Can they be done fully delayed? If they cannot, identify and fix any forced computation.
• Look into Failure to perform compute_Sv with dask inputs #1212. This is delayed computation, but memory leaks.
• Modify compress_pulse to not have any .compute(). Might be as simple as just not calling it.

I'm leaving this as 1 issue to be done for Milestone 0.9.0, but this can be done in separate PRs and different milestones if it becomes too much for one PR, which it probably will.

[leewujung]

#1311 addresses the last point. It also includes other components required to handle lazy-loaded EchoData object for calibrating broadband complex data.

[ctuguinay]

Closed by merging of #1311 and #1331