[DOCS] fix tutorials for v2.0 (#422)

- Fix meta-parameter usage on tutorials.
- Install tutorial dependencies on CI.
- Switch from `requirements-test.txt` to `extras_require` for test dependencies, and also use it for tutorial dependencies.
- Make some performance tests deterministic.

docs/getting-started/installation.rst

@@ -44,7 +44,7 @@ You can then test your installation by running the unit tests:
 
 .. code-block:: bash
 
-      pip install -r requirements-test.txt
+      pip install -e '.[tests]'
       pytest -vs test/unit/
 
 and the benchmarks