Add support for checking multiple JWTMiddlewares

[noamsan]

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

🔧 Changes

📚 References

🔬 Testing

[ewanharris]

Thanks for the PR @noamsan!

I have a concern about potentially including this type of functionality in the middleware vs potentially documenting how to chain the middleware. My concern is whether a single chaining solution would fit all use cases (some might want to only continue if all pass rather than just one for example).

Do you see any reason why documentation on chaining multiple JWTMiddleware instances might not be enough to cover this?

[noamsan]

Hey @ewanharris - if chaining covers the case of "two JWT issuers but only one is required to pass", then documentation on chaining should definitely suffice.