common: dedup and move banner to common/logging (#2846)

common/logging/src/lib.rs

@@ -23,3 +23,20 @@ pub fn setup_logging() {
         .filter_module("sled", log::LevelFilter::Warn)
         .init();
 }
+
+pub fn banner(crate_name: &str, crate_version: &str) -> String {
+    format!(
+        r#"
+
+      _ __  _   _ _ __ ___
+     | '_ \| | | | '_ \ _ \
+     | | | | |_| | | | | | |
+     |_| |_|\__, |_| |_| |_|
+            |___/
+
+             ({:} - version {:})
+
+    "#,
+        crate_name, crate_version
+    )
+}