Moving some of the setup logic straight into the docker build

Author: BujSet

.ci/docker/common/install_zephyr.sh

@@ -88,5 +88,16 @@ install_sdk() {
          ./setup.sh -c -t arm-zephyr-eabi
 }
 
+init_zephyr() {
+    git clone https://github.com/BujSet/zephyr.git
+    cd zephyr/
+    git switch -c executorch-module-integration origin/executorch-module-integration
+    cd ../
+    west init -l zephyr
+    west config manifest.project-filter -- +executorch
+    west -v update
+}
+
 install_prerequiresites
 install_sdk
+init_zephyr

.github/workflows/trunk.yml

@@ -75,14 +75,8 @@ jobs:
 
         source .ci/scripts/utils.sh
 
-        cd ../
-        git clone https://github.com/BujSet/zephyr.git
-        cd zephyr/
-        git switch -c executorch-module-integration origin/executorch-module-integration
-        cd ../
-        west init -l zephyr
-        west config manifest.project-filter -- +executorch
-        west -v update
+        pwd
+        ls
         cd modules/lib/executorch
         python3 -m venv .venv && source .venv/bin/activate && pip install --upgrade pip
         ./install_executorch.sh