config: rename skip-sql-invoice-migration to skip-native-sql-migration

In future releases we will use this flag to make potentially failing kv
to native SQL migrations optional. For this reason it is better to
rename it to avoid confusion.

docs/release-notes/release-notes-0.19.0.md

@@ -368,6 +368,10 @@ The underlying functionality between those two options remain the same.
   ](https://github.com/lightningnetwork/lnd/pull/9438) tombstone after native 
   SQL migration.
 
+* [Rename of skip migration
+  flag](https://github.com/lightningnetwork/lnd/pull/9606/) for future
+  compatibility.
+
 ## Code Health
 
 * A code refactor that [moves all the graph related DB code out of the