Build MacOS lre-rs image

[palfrey]

Description

#2270 published the Linux lre-rs image, this one adds the MacOS version so local builds there can work as well

Type of change

Please delete options that aren't relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

bazel test //... with RBE

Checklist

• Updated documentation if needed
• Tests added/amended
• bazel test //... passes locally
• PR is contained in a single commit, using git amend see some docs

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This change is 

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