changed test execution from Poetry into Pytest

This has been long time coming (for example for performance reasons), but was triggered by this poetry update that crashed the CI pipeline:

 - https://github.com/owasp-sbot/OSBot-Utils/actions/runs/12632720785/job/35198284338
 - python-poetry/poetry#9961
 - python-poetry/poetry#9957
 - python-poetry/poetry-core#803

.github/workflows/ci-pipeline__dev.yml

@@ -20,16 +20,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-
-      - name: Poetry - Install Dependencies
-        uses: owasp-sbot/OSBot-GitHub-Actions/.github/actions/poetry__install@dev
-        with:
-          pip_install: '-r requirements-test.txt'
-          python-version: ${{ matrix.python-version }}
-
-      - name: Run Unit Tests (using Poetry)
-        uses: owasp-sbot/OSBot-GitHub-Actions/.github/actions/poetry__run-unit-tests@dev
-
+      - name: Run Unit Tests (using Pytest)
+        uses: owasp-sbot/OSBot-GitHub-Actions/.github/actions/pytest__run-tests@dev
 
   increment-tag:
     name: Increment Tag - DEV