* [Generator] Support more config, data rates
Update sinewave generator to use webworker, have more
configuration options. Now supports higher data rates.
Also wrote telemetry provider for new API, and updated
legacy provider as well while we flesh out the telemetry API.
Fixes https://github.com/nasa/openmct/issues/1337
* Proper Step Timing, proper value passthrough
* Remove unused value, remove non-functional plugin
Remove an unnecessary datum value, `time`, and remove the new style
plugin -- which does not actually work -- to prevent confusion.
Addresses
https://github.com/nasa/openmct/pull/1353#pullrequestreview-12571665
Add ability to subscribe/unsubscribe to streaming
telemetry updates. This may be more performant than
polling in some circumstances, and appears necessary
for good performance of autoflow tabular views,
WTD-614.
