RSDK-9248: stop using canon in module workflows, use image directly instead

[martha-johnston]

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[martha-johnston]

@hexbabe, is this what you meant? I was looking at the raspberry pi code as an example but it's not clear to me how this knows to use the image specified in the matrix

[hexbabe]

under

runs-on: ${{ matrix.arch }}

try adding

    container:
      image: ${{ matrix.image }}

I think rn there is a field in the matrix that defines which image to use, but the workflow isn't using that value to actually run the workflow inside it.