infra: Install device-tree-compiler in CI workflows

The tests require dtc (Device Tree Compiler) to compile device tree
files. Without it, lopper_sanity.py fails when trying to invoke dtc:

  AttributeError: 'NoneType' object has no attribute 'split'
  at: dtcargs = (os.environ.get('LOPPER_DTC') or shutil.which("dtc")).split()

This commit adds installation of the device-tree-compiler package
from apt before running tests in both CI and release workflows.

Signed-off-by: Bruce Ashfield <bruce.ashfield@amd.com>

Author: Bruce Ashfield

.github/workflows/ci.yml

@@ -24,7 +24,12 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
 
-      - name: Install dependencies
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y device-tree-compiler
+
+      - name: Install Python dependencies
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt

.github/workflows/release.yml

@@ -23,7 +23,12 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
 
-      - name: Install dependencies
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y device-tree-compiler
+
+      - name: Install Python dependencies
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt