CI fix - deleting conda env before tests.

Fixing the caching issues with conda environments by deleting the
environment before installing dependencies and running tests. This
ensures that we are always working with a clean environment and prevents
issues caused by stale dependencies or bytecode.

Author: Sebastijan-Dominis

.github/workflows/tests.yml

@@ -13,6 +13,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Remove existing Conda environment
+        run: conda env remove -n hotel_management || true
+
       - name: Cache Conda packages
         uses: actions/cache@v4
         with: