Support `cpu-target` in `CompilerOptions`

[sjkelly]

This can be useful for ensuring repeatable results on a heterogeneous cluster. It appears we need to add a field here:

https://github.com/fonsp/Pluto.jl/blob/85f087ef5ea678f93c5338d2e2da149163e64007/src/Configuration.jl#L219-L268

[fonsp]

Feel free to make a PR! Should not be too complex :)