Reformat imports to a consistent style for imports

rustfmt.toml configuration:
  imports_granularity = "One"
  group_imports = "One"

accountsdb-plugin-postgres/src/accountsdb_plugin_postgres.rs

@@ -1,5 +1,4 @@
 use solana_measure::measure::Measure;
-
 /// Main entry for the PostgreSQL plugin
 use {
     crate::{