ci: add "integrations-tests-fast" tox command

Author: a-dubs

test-requirements.txt

@@ -1,4 +1,5 @@
 mock
 pytest
 pytest-cov
-pytest-mock
+pytest-mock
+pytest-xdist

tox.ini

@@ -83,12 +83,17 @@ deps =
     -rrequirements.txt
     -rtest-requirements.txt
 
+[testenv:integration-tests-fast]
+commands = {envpython} -m pytest -n auto --log-cli-level=INFO -svv {posargs:tests/integration_tests}
+deps =
+    -rrequirements.txt
+    -rtest-requirements.txt
+
 [testenv:integration-tests-ci]
 commands = {envpython} -m pytest -m ci --log-cli-level=INFO -svv {posargs:tests/integration_tests}
 deps =
   -rrequirements.txt
   -rtest-requirements.txt
-  pytest-xdist
 
 [testenv:integration-tests-main-check]
 # Since we can't use GH secrets from a forked PR, run the cloud-based