Fix unit tests failing because of spaces in the Insiders workflow (microsoft#14306)

* Add .fileToCommandArgument()
* Add custom workflow to test with spaces
* Use toCommandArgument instead of fileToCommandArgument
* Fix upload coverage step
* $$$$$
* Delete test workflow
* Update upload coverage step

Author: kimadeline

.github/workflows/insiders.yml

@@ -301,7 +301,7 @@ jobs:
         uses: actions/upload-artifact@v1
         with:
           name: ${{runner.os}}-${{env.COVERAGE_REPORTS}}
-          path: .nyc_output
+          path: ${{ env.special-working-directory }}/.nyc_output
         if: matrix.test-suite == 'ts-unit' && startsWith(matrix.python, 3.)
 
       # Run the Python and IPython tests in our codebase.

src/test/interpreters/activation/service.unit.test.ts

@@ -146,7 +146,7 @@ suite('Interpreters Activation - Python Environment Variables', () => {
                             const expectedCommand = [
                                 ...cmd,
                                 `echo '${getEnvironmentPrefix}'`,
-                                `python ${isolated} ${printEnvPyFile.fileToCommandArgument()}`
+                                `python ${isolated.toCommandArgument()} ${printEnvPyFile.fileToCommandArgument()}`
                             ].join(' && ');
 
                             expect(shellCmd).to.equal(expectedCommand);