chore: update python dependencies + pin pip (#245)

* Pin pip to 24.2 due to jazzband/pip-tools#2131
* Update python dependencies using 'tox -e update-requirements'
* Remove unused pytest-lazy-fixture package

Ref canonical/bundle-kubeflow#1177
Ref canonical/bundle-kubeflow#1185

requirements-fmt.txt

@@ -4,21 +4,21 @@
 #
 #    pip-compile requirements-fmt.in
 #
-black==23.7.0
+black==24.8.0
     # via -r requirements-fmt.in
-click==8.1.6
+click==8.1.7
     # via black
-isort==5.12.0
+isort==5.13.2
     # via -r requirements-fmt.in
 mypy-extensions==1.0.0
     # via black
-packaging==23.1
+packaging==24.2
     # via black
-pathspec==0.11.2
+pathspec==0.12.1
     # via black
-platformdirs==3.10.0
+platformdirs==4.3.6
     # via black
-tomli==2.0.1
+tomli==2.2.1
     # via black
-typing-extensions==4.7.1
+typing-extensions==4.12.2
     # via black