Plots - remove legacy code (#3814)

* Remove Lecacy plot code
* Adds tests for plots inspector
* Set range max and min to undefined instead of 0

index.html

@@ -88,7 +88,6 @@
         openmct.install(openmct.plugins.ExampleImagery());
         openmct.install(openmct.plugins.PlanLayout());
         openmct.install(openmct.plugins.Timeline());
-        openmct.install(openmct.plugins.PlotVue());
         openmct.install(openmct.plugins.UTCTimeSystem());
         openmct.install(openmct.plugins.AutoflowView({
             type: "telemetry.panel"