Add rule to warn not to migrate certain models

[ataker]

Description

Add a warning not to migrate React Modals that need to remain for the injected header. This will only show in certain directories based on .eslintrc files in vets-website.

Partial Injected Header - Add eslint warning & inline comments for React Modals that should not be touched#2541

Testing done

Added test. Tested eslint in vet-website locally.

Screenshots

Acceptance criteria

• Add warning not to upgrade Modals

Definition of done

• Changes have been tested in vets-website
• Changes have been tested in IE11, if applicable
• Documentation has been updated, if applicable
• A link has been provided to the originating GitHub issue (or connected to it via ZenHub)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs

[ataker]

Wanted to point out in the screenshot it does show both "upgrade this component" and "DO NOT upgrade this component" messages. I could make it so it only shows the correct one, but it would require pulling the modalTransformer out of the prefer-web-component rules so it could individually be toggled on/off in certain directories. It wouldn't be too much work, just wanted feedback before starting on it.

[jamigibbs]

I could make it so it only shows the correct one, but it would require pulling the modalTransformer out of the prefer-web-component rules so it could individually be toggled on/off in certain directories. It wouldn't be too much work, just wanted feedback before starting on it.

Are there any other usages of the Modal React component outside of the injected header at this point?

[jamigibbs]

This will only show in certain directories based on .eslintrc files in vets-website.

How does this work? Is there a corresponding vets-website PR?

[ataker]

There's only one instance of a React Modal outside of these directories and it's in the github-actions directory. I think I'm fine making this message eslint rule universal and removing the "please upgrade this message".