multi: extend InvoiceDB methods with a context argument (#8066)

* multi: extend InvoiceDB methods with a context argument

This commit adds a context to InvoiceDB's methods. Along this refactor
we also extend InvoiceRegistry methods with contexts where it makes
sense. This change is essential to be able to provide kvdb and sqldb
implementations for InvoiceDB.

* channeldb: restrict invoice tests to only use an InvoiceDB instance

* docs: update release notes for 0.18.0

docs/release-notes/release-notes-0.18.0.md

@@ -64,11 +64,18 @@
 ## BOLT Spec Updates
 ## Testing
 ## Database
+
+* [Add context to InvoiceDB
+  methods](https://github.com/lightningnetwork/lnd/pull/8066). This change adds
+  a context parameter to all `InvoiceDB` methods which is a pre-requisite for
+  the SQL implementation.
+
 ## Code Health
 ## Tooling and Documentation
 
 # Contributors (Alphabetical Order)
 
+* Andras Banki-Horvath
 * Carla Kirk-Cohen
 * Elle Mouton
 * Yong Yu