feat(core): add loading state to remove coupon code button

[jorgemoya]

What/Why?

Noticed it had no loading state.

Testing

Locally.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
catalyst-latest	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 3, 2024 6:55pm

5 Ignored Deployments

Name	Status	Preview	Comments	Updated (UTC)
catalyst-1millionproducts-store	⬜️ Ignored (Inspect)	Visit Preview		Jun 3, 2024 6:55pm
catalyst-au	⬜️ Ignored (Inspect)	Visit Preview		Jun 3, 2024 6:55pm
catalyst-ppr	⬜️ Ignored (Inspect)	Visit Preview		Jun 3, 2024 6:55pm
catalyst-test-store	⬜️ Ignored (Inspect)	Visit Preview		Jun 3, 2024 6:55pm
catalyst-uk	⬜️ Ignored (Inspect)	Visit Preview		Jun 3, 2024 6:55pm

[changeset-bot]

🦋 Changeset detected

Latest commit: 93b3677

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@bigcommerce/catalyst-core	Patch

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[github-actions]

⚡️🏠 Lighthouse report

Lighthouse ran against https://catalyst-latest-kkcqxsw78-bigcommerce-platform.vercel.app

🖥️ Desktop

We ran Lighthouse against the changes on a desktop and produced this report. Here's the summary:

Category	Score
🟢 Performance	100
🟢 Accessibility	100
🟢 Best practices	100
🟢 SEO	90

📱 Mobile

We ran Lighthouse against the changes on a mobile and produced this report. Here's the summary:

Category	Score
🟢 Performance	98
🟢 Accessibility	100
🟢 Best practices	100
🟢 SEO	92