fix: don't package mojom{,-lite}.js files in dist.zip

[nornagon]

Description of Change

These files aren't needed for Electron to run. I believe the dependency on them is in error in Chromium, but I'm not sure what the right upstream fix is for now so just masking them out in zip.py.

Checklist

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

Release Notes

Notes: Removed inadvertently included mojom.js files from distribution bundle.

[release-clerk]

Release Notes Persisted

Removed inadvertently included mojom.js files from distribution bundle.

[nornagon]

/trop run backport-to 6-0-x

[trop]

The backport process for this PR has been manually initiated,
sending your 1's and 0's to "6-0-x" here we go! :D

[trop]

I have automatically backported this PR to "6-0-x", please check out #18486

[miniak]

/trop run backport-to 5-0-x

[trop]

The backport process for this PR has been manually initiated,
sending your 1's and 0's to "5-0-x" here we go! :D

[trop]

I have automatically backported this PR to "5-0-x", please check out #19176

[miniak]

/trop run backport-to 4-2-x

[trop]

The backport process for this PR has been manually initiated,
sending your 1's and 0's to "4-2-x" here we go! :D

[trop]

I have automatically backported this PR to "4-2-x", please check out #19178

[miniak]

/trop run backport-to 5-0-x

[trop]

The backport process for this PR has been manually initiated,
sending your 1's and 0's to "5-0-x" here we go! :D

[trop]

I have automatically backported this PR to "5-0-x", please check out #19192