fix(DICOM PDF and Video): fixes for local DICOM load and remote data sources (#3374)

* fix(DICOM PDF and Video)
- added retrieve.directURL for local DICOM load data source; it returns a data URL
- fixed various checks for video using transfer syntaxes and SOP class UID with number of frames
- added call to 'rendered' endpoint for those data sources that support it; others get BulkDataURI

* Added DOC (PDF) and OT (for video in particular) to list of non-image thumbnail modalities.

* Fixed broken e2e tests.

platform/viewer/cypress/integration/OHIFPdfDisplay.spec.js

@@ -6,7 +6,7 @@ describe('OHIF PDF Display', function() {
   });
 
   it('checks if series thumbnails are being displayed', function() {
-    cy.get('[data-cy="study-browser-thumbnail"]')
+    cy.get('[data-cy="study-browser-thumbnail-no-image"]')
       .its('length')
       .should('be.gt', 0);
   });

platform/viewer/cypress/integration/OHIFVideoDisplay.spec.js

@@ -5,13 +5,15 @@ describe('OHIF Video Display', function() {
   });
 
   it('checks if series thumbnails are being displayed', function() {
-    cy.get('[data-cy="study-browser-thumbnail"]')
+    cy.get('[data-cy="study-browser-thumbnail-no-image"]')
       .its('length')
       .should('be.gt', 1);
   });
 
   it('performs double-click to load thumbnail in active viewport', () => {
-    cy.get('[data-cy="study-browser-thumbnail"]:nth-child(2)').dblclick();
+    cy.get(
+      '[data-cy="study-browser-thumbnail-no-image"]:nth-child(2)'
+    ).dblclick();
 
     //const expectedText = 'Ser: 3';
     //cy.get('@viewportInfoBottomLeft').should('contains.text', expectedText);