harden SqliteCurrentAllEventsSpec (#5270)

Accidentally shared a database with the "all events by tag" query, which caused the spec to have a dirty read

Author: Aaronontheweb

src/contrib/persistence/Akka.Persistence.Sqlite.Tests/Query/SqliteCurrentAllEventsSpec.cs

@@ -30,7 +30,7 @@ class = ""Akka.Persistence.Sqlite.Journal.SqliteJournal, Akka.Persistence.Sqlite
                 table-name = event_journal
                 metadata-table-name = journal_metadata
                 auto-initialize = on
-                connection-string = ""Filename=file:memdb-journal-eventsbytag-{id}.db;Mode=Memory;Cache=Shared""
+                connection-string = ""Filename=file:memdb-journal-allevents-{id}.db;Mode=Memory;Cache=Shared""
                 refresh-interval = 1s
             }}
             akka.test.single-expect-default = 10s")