build: ignore post-install scripts

[eatyourgreens]

The GitHub CI workflows and the Docker builds already run yarn install with the --ignore-scripts flag. This PR makes the same change to the bootstrap scripts for local development.

I've also tidied up bin/bootstrap.sh so that it only runs the install once, then builds the various packages in order.

Please request review from @zooniverse/frontend team or an individual member of that team.

Linked Issue and/or Talk Post

• closes yarn bootstrap errors on MacOS while building the canvas dependency #6391.

How to Review

yarn bootstrap should build the various packages as usual. Tests should still run, and the Next.js apps should still run.

Checklist

PR Creator - Please cater the checklist to fit the review needed for your code changes.
PR Reviewer - Use the checklist during your review. Each point should be checkmarked or discussed before PR approval.

General

• Tests are passing locally and on Github
• Documentation is up to date and changelog has been updated if appropriate
• You can yarn panic && yarn bootstrap or docker-compose up --build and FEM works as expected
• FEM works in all major desktop browsers: Firefox, Chrome, Edge, Safari (Use Browserstack account as needed)
• FEM works in a mobile browser

[coveralls]

coverage: 77.762% (+0.03%) from 77.729%
when pulling fd9e4d0 on eatyourgreens:ignore-install-scripts
into f54edb8 on zooniverse:master.

[goplayoutside3]

The changes here are superseded by #6446. Okay to close?

[eatyourgreens]

Sounds good. #6446 should close #6391 too, since it globally disables post-install scripts.