Use `--layout=packed` for all monolithic resolves. (cherrypick of #13400)#13403

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stuhood merged 1 commit intopantsbuild:2.8.xfrom stuhood:stuhood/pick-13400-for-2.8.x

Oct 28, 2021

Commits on Oct 28, 2021

Use --layout=packed for all monolithic resolves. (pantsbuild#13400 )
stuhood
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