build: add release-env context to publish-macos

[VerteDinde]

Description of Change

Adds the variable context: release-env to the publish-macos build step in CircleCI. This matches publish-linux and is required for uploading releases.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• relevant documentation is changed or added
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: none

[release-clerk]

No Release Notes

[trop]

I was unable to backport this PR to "10-x-y" cleanly;
you will need to perform this backport manually.

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I have automatically backported this PR to "13-x-y", please check out #28939

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I have automatically backported this PR to "11-x-y", please check out #28940

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I have automatically backported this PR to "12-x-y", please check out #28941

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@VerteDinde has manually backported this PR to "10-x-y", please check out #28946