Refactor formatTime into util class (#3073)

While looking at https://github.com/MichMich/MagicMirror/pull/3070 I
noticed that the weather and clock module do some formatTime stuff, so
why not use a common function for that?

---------

Co-authored-by: veeck <michael@veeck.de>

.github/workflows/automated-tests.yaml

@@ -22,6 +22,12 @@ jobs:
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v3
+      - name: "Set timezone"
+        uses: szenius/set-timezone@v1.2
+        with:
+          timezoneLinux: "Europe/Berlin"
+          timezoneMacos: "Europe/Berlin"
+          timezoneWindows: "Europe/Berlin"
       - name: "Use Node.js ${{ matrix.node-version }}"
         uses: actions/setup-node@v3
         with:

.github/workflows/codecov-test-suites.yaml

@@ -19,6 +19,12 @@ jobs:
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v3
+      - name: "Set timezone"
+        uses: szenius/set-timezone@v1.2
+        with:
+          timezoneLinux: "Europe/Berlin"
+          timezoneMacos: "Europe/Berlin"
+          timezoneWindows: "Europe/Berlin"
       - name: "Install dependencies and run coverage"
         run: |
           Xvfb :99 -screen 0 1024x768x16 &