[rush] Add support for pnpm ignoredOptionalDependencies

[glitchkyle]

Summary

Fixes #4859

Changes include updating pnpm configuration to use pnpm's ignoredOptionalDependencies setting. End-user should now be able to specify optional dependencies in common/config/rush/pnpm-config.json in case some optional dependencies are required at a later point.

Details

Changes focused on updating the rush init template and havingignoredOptionalDependencies in common/temp/package.json copied from common/config/rush/pnpm-config.json. Changes might not fully reflect until schema changes and rushVersion are updated after merging this PR.

How it was tested

1. Ran rush init (when I had the schema changed in common/config/rush/pnpm-config.json) to check if common/config/rush/pnpm-config.json contained newly added field globalIgnoredOptionalDependencies
2. Ran rush update with local build after adding fsevents in globalIgnoredOptionalDependencies to see if fsevents was in common/temp/package.json

Impacted documentation

PR might affect pnpm-config.json schema (https://rushjs.io/pages/configs/pnpm-config_json/)

[glitchkyle]

@microsoft-github-policy-service agree

[glitchkyle]

Making a draft PR for now while waiting for response on Zullipchat regarding testing changes and how to fix failing CI.

[D4N14L]

@glitchkyle it looks like your description mentions updating the rush init template, but I don't see any changes relating to that. Were they missed?

[glitchkyle]

@glitchkyle it looks like your description mentions updating the rush init template, but I don't see any changes relating to that. Were they missed?

I could be wrong here but I thought the pnpm-config.json that contains the rush init template will be changed once the rushVersion is also updated.

Should be a quick change though by adding globalIgnoredOptionalDependencies in libraries/rush-lib/assets/rush-init/common/config/rush/pnpm-config.json.

[D4N14L]

@glitchkyle it looks like your description mentions updating the rush init template, but I don't see any changes relating to that. Were they missed?

I could be wrong here but I thought the pnpm-config.json that contains the rush init template will be changed once the rushVersion is also updated.

Should be a quick change though by adding globalIgnoredOptionalDependencies in libraries/rush-lib/assets/rush-init/common/config/rush/pnpm-config.json.

@glitchkyle yes you'll need to manually update the template. It's not updated as a part of any auto-generation process.... though that would be nice.