Fix including interval in response of device authorization request

[hafezdivandari]

This PR does:

• Fix a typo on DeviceCodeRepositoryInterface::getDeviceCodeEntityByDeviceCode() argument, string $deviceCodeEntity -> string $deviceCode.
• Fix a bug where enabling the interval visibility is ignored:
  • RFC8628 Section 3.2
  • Even by explicitly calling $grant->setIntervalVisibility(true) the response still doesn't include interval. On the response you are excluding interval when it's set to default 5. Although the server may use the default interval value, we still want to include the internal on the response.
• Fix a bug where the new poll date is not persisted when slow_down error happens, because the exception is thrown before calling persistDeviceCode.
• Increase interval by 5 when slow_down error happens according to section 3.5 of RFC8628.
• Fix a bug where slow_down error response where returned even after the user has completed the auth flow (already approved / denied the request).
• Include the interval value on authorization_pending and slow_down error responses.

[Sephster]

@hafezdivandari apologies I've not forgotten about this. My partner is sick just now and my son has a sickness bug so I have little time but will get to it as soon as she is better. Apologies for the delay. Just wanted to give you an update

[hafezdivandari]

@Sephster No worries at all! Take all the time you need. I hope your family feels better soon.

[hafezdivandari]

Hi @Sephster, hope you’re doing well. Any progress on the PRs related to Laravel Passport? I’ve listed them all here.