Revert "Default to --no-cov when debugging pytest" (microsoft#21152)

Reverts microsoft#21048

Closes microsoft#21146
Related microsoft#19985

Author: karthiknadig

src/client/testing/testController/pytest/runner.ts

@@ -95,10 +95,6 @@ export class PytestRunner implements ITestsRunner {
                 testArgs.push('--capture', 'no');
             }
 
-            if (options.debug && !testArgs.some((a) => a.startsWith('--no-cov'))) {
-                testArgs.push('--no-cov');
-            }
-
             // Positional arguments control the tests to be run.
             const rawData = idToRawData.get(testNode.id);
             if (!rawData) {