refactor(providers): Migrate from onesignal-node SDK to the official @onesignal/node-onesignal

[Dhoni77]

What change does this PR introduce?

• Remove onesignal-node sdk
• Use @onesignal/node-onesignal sdk
• Updated unit tests

Why was this change needed?

Closes #4635

Due to vulnerabilities and un-maintained SDK, we should move from using unofficial onesignal-node SDK.

[scopsy]

We need to make sure that we are not providing a breaking change for old configuration users who used the apiKey and applicationId approach.

[scopsy]

@Dhoni77 another approach we can take is using the rest API directly which works with API key and AppId like previously: https://documentation.onesignal.com/reference/create-notification we can use axios for the API call, wdyt?

[Dhoni77]

@Dhoni77 another approach we can take is using the rest API directly which works with API key and AppId like previously: https://documentation.onesignal.com/reference/create-notification we can use axios for the API call, wdyt?

Sure I'll try using the rest api