Offer a Suspending API for `EncryptedLogging.enqueueSendingEncryptedLogs(...)`

This came as an idea after working on [WCAndroid#14711](https://github.com/woocommerce/woocommerce-android/pull/14711), where we identified a limitation of using `appCoroutineScope.launch { ... }` with `encryptedLogging.enqueueSendingEncryptedLogs(...)` for `FATAL` errors.

For more info see (Internal discussion): p1759832867149029-slack-CGPNUU63E

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FYI: Another idea to address this issue, from a different angle, could be:

- In case of `FATAL` error, store an "intent" of sending logs in the future.
- On the next app resume, check the "intent" and collect logs then (because they’re stored now on the disk).