Use env variables rather than custom ci scripts

.github/workflows/coverage.yaml

@@ -1,6 +1,6 @@
 # Perform CI checks, and calculate code coverage
 
-name: Code Coverage
+name: SQLite
 
 on: ["push", "pull_request"]
 
@@ -10,10 +10,11 @@ jobs:
   # These tests are used for code coverage analysis
   coverage:
     runs-on: ubuntu-latest
+
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       INVENTREE_DB_NAME: './test_db.sqlite'
-      INVENTREE_DB_ENGINE: sqlite3
+      INVENTREE_DB_ENGINE: django.db.backends.sqlite3
 
     steps:
       - name: Checkout Code

.github/workflows/mariadb.yaml

@@ -7,6 +7,15 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
+    env:
+      # Database backend configuration
+      INVENTREE_DB_ENGINE: django.db.backends.mysql
+      INVENTREE_DB_USER: root
+      INVENTREE_DB_PASSWORD: password
+      INVENTREE_DB_HOST: '127.0.0.1'
+      INVENTREE_DB_PORT: 3306
+
+
     services:
       mariadb:
         image: mariadb:latest
@@ -32,6 +41,6 @@ jobs:
         pip3 install mysqlclient
         invoke install
     - name: Run Tests
-        run: |
-          cd InvenTree
-          python3 manage.py test --settings=InvenTree.ci_mysql
+      run: |
+        cd InvenTree
+        python3 manage.py test --settings=InvenTree.ci_mysql

.github/workflows/mysql.yaml

@@ -9,6 +9,14 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
+    env:
+      # Database backend configuration
+      INVENTREE_DB_ENGINE: django.db.backends.mysql
+      INVENTREE_DB_USER: root
+      INVENTREE_DB_PASSWORD: password
+      INVENTREE_DB_HOST: '127.0.0.1'
+      INVENTREE_DB_PORT: 3306
+
     services:
       mysql:
         image: mysql:latest

.github/workflows/postgresql.yaml

@@ -9,6 +9,15 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
+    env:
+      # Database backend configuration
+      INVENTREE_DB_ENGINE: django.db.backends.postgresql
+      INVENTREE_DB_USER: inventree
+      INVENTREE_DB_PASSWORD: password
+      INVENTREE_DB_HOST: '127.0.0.1'
+      INVENTREE_DB_PORT: 5432
+
+
     services:
       postgres:
         image: postgres