refactor: [M3-8366] – DiskEncryption slight refactor & renaming

[dwiley-akamai]

Description 📝

Lay the ground work for Encryption (formerly DiskEncryption) component to be reusable for Volume Encryption.

Changes 🔄

• DiskEncryption --> Encryption directory name change, DiskEncryption.tsx --> Encryption.tsx component name change, & associated import updates
• Minor refactors in Encryption.tsx to make it more easily reusable for Volume Encryption (not hardcoding "Disk Encryption", etc.)

Target release date 🗓️

8/5/24

How to test 🧪

The primary concern at this juncture given the refactoring of Encryption.tsx is ensuring no regressions for LDE in the Linode Create flow and Linode Rebuild dialog.

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: 82.44%
Current Coverage: 82.44%

[AzureLatte]

Looks like all test failures are related with Volumes, which were not caused by these changes.