Improve support for updating docker images in --from options to RUN Dockerfile instructions

[aradkdj]

Tell us more.

Support parsing version information from a RUN's --mount=from when a docker image does not appear as the first mount for the instruction.

Reproduction repo: https://github.com/aradkdj/renovate-37280-reproduction

[github-actions[bot]]

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[aradkdj]

Reproduction repo is now available and linked

[rarkins]

Lorum ipsum?

[aradkdj]

I'm terribly sorry. I thought I had pushed the description. It is updated now

[rarkins]

Converted to issue: #37534