ref(logging): remove LogExt::log_or_ok (#4250)

This further reduces the cognitive overload of having many ways to do
something.  The same is very easily done using composition.  Followup
from 82ace72527.

src/imex.rs

@@ -759,7 +759,7 @@ async fn export_database(context: &Context, dest: &Path, passphrase: String) ->
         .with_context(|| format!("path {} is not valid unicode", dest.display()))?;
 
     context.sql.set_raw_config_int("backup_time", now).await?;
-    sql::housekeeping(context).await.ok_or_log(context);
+    sql::housekeeping(context).await.log_err(context).ok();
     context
         .sql
         .call_write(|conn| {