fix(backend): Remove cache timer to fix empty cache bug

[BRKalow]

Description

Re-implementing #3321 for release/v4

Checklist

• npm test runs as expected.
• npm run build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

[changeset-bot]

🦋 Changeset detected

Latest commit: ef589e4

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

This PR includes changesets to release 6 packages

Name	Type
@clerk/backend	Patch
@clerk/fastify	Patch
gatsby-plugin-clerk	Patch
@clerk/nextjs	Patch
@clerk/remix	Patch
@clerk/clerk-sdk-node	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[BRKalow]

!snapshot

[clerk-cookie]

Hey @BRKalow - the snapshot version command generated the following package versions:

Package	Version
@clerk/backend	0.38.7-snapshot.vef589e4
@clerk/fastify	0.6.40-snapshot.vef589e4
gatsby-plugin-clerk	4.4.42-snapshot.vef589e4
@clerk/nextjs	4.29.13-snapshot.vef589e4
@clerk/remix	3.2.4-snapshot.vef589e4
@clerk/clerk-sdk-node	4.13.15-snapshot.vef589e4

Tip: Use the snippet copy button below to quickly install the required packages.
@clerk/backend

npm i @clerk/backend@0.38.7-snapshot.vef589e4 --save-exact

@clerk/fastify

npm i @clerk/fastify@0.6.40-snapshot.vef589e4 --save-exact

gatsby-plugin-clerk

npm i gatsby-plugin-clerk@4.4.42-snapshot.vef589e4 --save-exact

@clerk/nextjs

npm i @clerk/nextjs@4.29.13-snapshot.vef589e4 --save-exact

@clerk/remix

npm i @clerk/remix@3.2.4-snapshot.vef589e4 --save-exact

@clerk/clerk-sdk-node

npm i @clerk/clerk-sdk-node@4.13.15-snapshot.vef589e4 --save-exact

[dimkl]

🔧 I would suggest we move the cache cleaning to loadClerkJWKFromRemote where the cacheHasExpired is used and keep this method pure.