test: [M3-7318] - Combine vpc details page subset create, edit, and delete tests

[AzureLatte]

Description 📝

Combine 3 tests into 1 to create a subnet, edit it and confirm the details page updates to reflect the change, and then delete the subnet and once again confirm that the page updates to reflect the removed subnet.

Changes 🔄

• modified cypress/e2e/core/vpc/vpc-details-page.spec.ts

How to test 🧪

yarn cy:run -s "cypress/e2e/core/vpc/vpc-details-page.spec.ts”

As an Author I have considered 🤔

Check all that apply

• [x] 👀 Doing a self review
• [ ] ❔ Our contribution guidelines
• [ ] 🤏 Splitting feature into small PRs
• [x] ➕ 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[bot]]

Coverage Report: ✅
Base Coverage: 82.43%
Current Coverage: 82.43%