Replace apt-get with npm for Azure Functions Core Tools installation (#12537)

* Initial plan

* Replace apt-get with npm for Azure Functions Core Tools installation

- Change from apt-get to npm installation method to avoid package mirror sync issues
- Updated .github/workflows/run-tests.yml
- Updated .github/workflows/tests-runner.yml (2 locations)
- Uses official npm installation: npm i -g azure-functions-core-tools@4 --unsafe-perm true

Co-authored-by: davidfowl <95136+davidfowl@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: davidfowl <95136+davidfowl@users.noreply.github.com>

Author: Copilot

.github/workflows/run-tests.yml

@@ -180,8 +180,7 @@ jobs:
       - name: Install Azure Functions Core Tools
         if: inputs.os == 'ubuntu-latest' && (inputs.testShortName == 'Playground' || inputs.testShortName == 'Azure')
         run: |
-          sudo apt-get update
-          sudo apt-get install -y azure-functions-core-tools-4
+          npm i -g azure-functions-core-tools@4 --unsafe-perm true
 
       - name: Compute test project path
         id: compute_project_path

.github/workflows/tests-runner.yml

@@ -117,8 +117,7 @@ jobs:
       - name: Install Azure Functions Core Tools
         if: runner.os == 'Linux'
         run: |
-          sudo apt-get update
-          sudo apt-get install -y azure-functions-core-tools-4
+          npm i -g azure-functions-core-tools@4 --unsafe-perm true
 
       - name: Test ${{ matrix.tests.label }}
         run: |
@@ -179,8 +178,7 @@ jobs:
       - name: Install Azure Functions Core Tools
         if: runner.os == 'Linux'
         run: |
-          sudo apt-get update
-          sudo apt-get install -y azure-functions-core-tools-4
+          npm i -g azure-functions-core-tools@4 --unsafe-perm true
 
       - name: Test ${{ matrix.tests.label }}
         env: