refactor: [M3-8746] – Move inputMaxWidth into Theme

[dwiley-akamai]

Description 📝

Follow-up to #11092 -- move inputMaxWidth into Theme so we can reference it as theme.inputMaxWidth as opposed to exporting & importing the inputMaxWidth variable

Changes 🔄

• Add inputMaxWidth to Theme
• Replace uses of inputMaxWidth variable in components with theme.inputMaxWidth

Target release date 🗓️

10/28/24

How to test 🧪

Verification steps

Confirm there are no width regressions for the VPC and Security sections in the Linode Create flow

As an Author I have considered 🤔

• 👀 Doing a self review
• ❔ Our contribution guidelines
• 🤏 Splitting feature into small PRs
• ➕ Adding a changeset
• 🧪 Providing/Improving test coverage
• 🔐 Removing all sensitive information from the code and PR description
• 🚩 Using a feature flag to protect the release
• 👣 Providing comprehensive reproduction steps
• 📑 Providing or updating our documentation
• 🕛 Scheduling a pair reviewing session
• 📱 Providing mobile support
• ♿ Providing accessibility support

[github-actions]

Coverage Report: ✅
Base Coverage: 87.06%
Current Coverage: 87.06%

[coliu-akamai]

✅ confirmed no VPC width regressions
✅ confirmed no Security width regressions in the skeleton

Thanks Dajahi! Would we need a changeset for the manager package?