gha: fix pip install on python actions

[ivotron]

The new ubuntu-latest complains when system-wide pip is invoked.

Backports Required

• none - not a bug fix
• none - this is a backport
• none - issue does not exist in previous branches
• none - papercut/not impactful enough to backport
• v24.2.x
• v24.1.x
• v23.3.x

Release Notes

• none

[clee]

LGTM, one note but not a dealbreaker.

[vbotbuildovich]

/backport v24.2.x

[vbotbuildovich]

/backport v24.1.x

[vbotbuildovich]

/backport v23.3.x

[vbotbuildovich]

Failed to create a backport PR to v24.1.x branch. I tried:

git remote add upstream https://github.com/redpanda-data/redpanda.git
git fetch --all
git checkout -b backport-pr-23715-v24.1.x-758 remotes/upstream/v24.1.x
git cherry-pick -x d2ec222f29

Workflow run logs.

[vbotbuildovich]

Failed to create a backport PR to v24.2.x branch. I tried:

git remote add upstream https://github.com/redpanda-data/redpanda.git
git fetch --all
git checkout -b backport-pr-23715-v24.2.x-853 remotes/upstream/v24.2.x
git cherry-pick -x d2ec222f29

Workflow run logs.

[vbotbuildovich]

Failed to create a backport PR to v23.3.x branch. I tried:

git remote add upstream https://github.com/redpanda-data/redpanda.git
git fetch --all
git checkout -b backport-pr-23715-v23.3.x-152 remotes/upstream/v23.3.x
git cherry-pick -x d2ec222f29

Workflow run logs.