fix(windows): use `git-lfs` installer and bump its version to 3.5.1

[lemeurherve]

Same as https://github.com/jenkinsci/docker-agent/pull/503, this PR mainly add git to the PATH before running git-lfs.exe install instead of git lfs install to avoir the error git: 'lfs' is not a git command. encountered when bumping git-lfs to its 3.4.0 version, cf https://github.com/jenkinsci/docker-ssh-agent/pull/277#issuecomment-1630239571

Other notable changes:

• test added to check if git-lfs (and thus git) is installed and in the PATH
• trimprefix added to the git-lfs source in the corresponding updatecli manifest, easier to work with in files operations and in test

Supersedes and closes #277

Testing done

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