chore: unpin dynaconf for testing

The pinned version still relies on pkg_resources, which setuptools
dropped since version 82.0.0. dynaconf does not use pkg_resources
anymore starting from version 3.2.1.

Since dynaconf should be stable, unpin it rather than bumping the pin,
so we can check whether new versions work fine.

Author: ptoscano

requirements_test.txt

@@ -16,7 +16,7 @@ pytest-cov
 pytest-check
 marshmallow==3.26.1
 pytest-jira
-dynaconf==3.1.11
+dynaconf
 freezegun
 oauthlib>=3.2.0
 kubernetes