[Plots] Ignore Infinity when autoscaling y-axis (#5907)

* Change approach to filter positive and negative infinity values when updating stats

* Change filter when there are no plot stats and a positive/negative infinity value occurs

* Add check for negative infinity

* Name the unplottable values array and move it to the constructor

* Add option to render infinity values

* Add e2e test to render plot with infinity values

* Add accessibility labels to help locate items in tests
Refactor tests

* refactor(e2e): stabilize plotRendering test

Co-authored-by: Shefali <simplyrender@gmail.com>
Co-authored-by: Jesse Mazzella <jesse.d.mazzella@nasa.gov>

example/generator/GeneratorProvider.js

@@ -33,7 +33,8 @@ define([
         dataRateInHz: 1,
         randomness: 0,
         phase: 0,
-        loadDelay: 0
+        loadDelay: 0,
+        infinityValues: false
     };
 
     function GeneratorProvider(openmct) {
@@ -56,7 +57,8 @@ define([
             'dataRateInHz',
             'randomness',
             'phase',
-            'loadDelay'
+            'loadDelay',
+            'infinityValues'
         ];
 
         request = request || {};