PC-1094 Tags on push

[paulcjh]

Pull request outline

This PR adds in the functionality to assign additional pointers/tags to a pipeline when pushing

Checklist:

• [x] Docs updated
• [x] Version bumped

Added:

• -p arg on pipeline container push
• -o field for force updating a pointer

Related issues:

none

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[linear[bot]]

PC-1094 Tags on push