refactor: removed IE leftovers from .github and gulp/constants (#7994)

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## Purpose
_Describe the problem you want to address or the feature you want to
implement._

## Approach
_Describe how your changes address the issue or implement the desired
functionality in as much detail as possible._

## References
_Provide a link to the existing issue(s), if any._

## Pre-Merge TODO
- [ ] Write tests for your proposed changes
- [ ] Make sure that existing tests do not fail

.github/ISSUE_TEMPLATE.md

@@ -32,7 +32,7 @@ Your complete test code (or attach your test files)
 
 * testcafe version:                   <!-- run `testcafe -v` -->
 * node.js version:                    <!-- run `node -v` -->
-* command-line arguments:  <!-- example: "testcafe ie,chrome -e test.js" -->
-* browser name and version: <!-- example: IE 11, Chrome 69, Firefox 100, etc. -->
+* command-line arguments:  <!-- example: "testcafe edge,chrome -e test.js" -->
+* browser name and version: <!-- example: Edge 116, Chrome 116, Firefox 117, etc. -->
 * platform and version:          <!-- example: "macOS 10.14, Windows, Linux Ubuntu 18.04.1, iOS 12 -->
 * other:                                   <!-- any notes you consider important -->

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -129,7 +129,7 @@ body:
     attributes:
       label: Command-line arguments
       description: >
-        Example: testcafe ie,chrome -e test.js
+        Example: testcafe edge,chrome -e test.js
     validations:
       required: true
 
@@ -138,7 +138,7 @@ body:
     attributes:
       label: Browser name(s) and version(s)
       description: >
-        Example: IE 11, Chrome 69, Firefox 100, etc.
+        Example: Edge 116, Chrome 116, Firefox 117, etc.
     validations:
       required: false
 

gulp/constants/client-test-settings.js

@@ -1,6 +1,6 @@
 const { assignIn } = require('lodash');
 
-const CLIENT_TEST_LOCAL_BROWSERS_ALIASES = ['ie', 'edge', 'chrome', 'firefox', 'safari'];
+const CLIENT_TEST_LOCAL_BROWSERS_ALIASES = ['edge', 'chrome', 'firefox', 'safari'];
 
 const CLIENT_TESTS_PATH        = 'test/client/fixtures';
 const CLIENT_TESTS_LEGACY_PATH = 'test/client/legacy-fixtures';