fix!: normalize Python depName in every manager (#27733)

docs/usage/python.md

lib/modules/manager/pep621/utils.ts

lib/modules/manager/pip-compile/extract.spec.ts

lib/modules/manager/pip-compile/extract.ts

...nager/pip_requirements/__snapshots__/extract.spec.ts.snap

lib/modules/manager/pip_requirements/extract.spec.ts

lib/modules/manager/pip_requirements/extract.ts

...ules/manager/pip_setup/__snapshots__/extract.spec.ts.snap

lib/modules/manager/pip_setup/extract.ts

lib/modules/manager/pipenv/extract.ts

...ules/manager/setup-cfg/__snapshots__/extract.spec.ts.snap

lib/modules/manager/setup-cfg/extract.ts

lib/modules/platform/github/index.spec.ts

lib/modules/platform/github/index.ts

lib/modules/platform/utils/github-alerts.ts

lib/workers/repository/init/vulnerability.spec.ts

lib/workers/repository/init/vulnerability.ts