Fixes yasr step functions.

What
Removes the yasqe yasr parameter from YasrSteps.

Why
The usage of such steps is inconsistent. The count of yasr instances depends on how the sparql view is opened:

- When the sparql view is opened and has more than one tab, calling a method like `getYasr(yasrIndex = 0)` would be expected to fetch an instance of the second tab. However, this is not the case. When the view is opened, only one instance is created for the active tab, so the test will fail with a timeout because the steps try to fetch the second instance of yasr.
- When the sparql view is opened with one tab, and then another tab is created, the steps work fine since yasgui has created two instances.

The parameter is removed to prevent misleading other developers who might not be aware of this yasr behavior.

How
The index parameter is removed and affected tests are fixed. Now all functions work with the active yasr of the active tab.

test-cypress/integration/explore/visual-graph/graphs-config.spec.js

@@ -265,7 +265,7 @@ describe('Graphs config', () => {
         // When I select preview query results
         VisualGraphSteps.previewQueryResults();
         // Then I expect to see the results table
-        YasrSteps.getYasr(0).should('be.visible');
+        YasrSteps.getYasr().should('be.visible');
         // When I select to edit query
         VisualGraphSteps.editQuery();
         // Then I expect to see the query editor with the previously selected query
@@ -282,7 +282,7 @@ describe('Graphs config', () => {
         // When I select to preview query results
         VisualGraphSteps.previewQueryResults();
         // Then I expect to see the results table
-        YasrSteps.getYasr(0).should('be.visible');
+        YasrSteps.getYasr().should('be.visible');
         // When I select to edit the selected query
         VisualGraphSteps.editQuery();
         // Then I expect to see the editor with the selected query

test-cypress/steps/yasgui/yasr-steps.js

@@ -1,9 +1,5 @@
 export class YasrSteps {
-    static getYasr(yasrIndex = 0) {
-        return cy.get('.yasr').eq(yasrIndex);
-    }
-
-    static getActiveYasr() {
+    static getYasr() {
         return cy.get('.tabPanel.active .yasr');
     }
 
@@ -12,7 +8,7 @@ export class YasrSteps {
     }
 
     static getResponseInfo() {
-        return YasrSteps.getActiveYasr().find('.yasr_response_chip');
+        return YasrSteps.getYasr().find('.yasr_response_chip');
     }
 
     static getErrorHeader() {
@@ -24,7 +20,7 @@ export class YasrSteps {
     }
 
     static getResults() {
-        return cy.get('.yasr_results tbody').find('tr');
+        return YasrSteps.getYasr('.yasr_results tbody').find('tr');
     }
 
     static getResultTableHeader() {