agent: Migrate tool names in settings (#29168)

Release Notes:

- agent: Add migration to rename `find_replace_file` tool to
`edit_file`, and `regex_search` to `grep`.

crates/migrator/src/migrator.rs

@@ -128,6 +128,10 @@ pub fn migrate_settings(text: &str) -> Result<Option<String>> {
             migrations::m_2025_04_15::SETTINGS_PATTERNS,
             &SETTINGS_QUERY_2025_04_15,
         ),
+        (
+            migrations::m_2025_04_21::SETTINGS_PATTERNS,
+            &SETTINGS_QUERY_2025_04_21,
+        ),
     ];
     run_migrations(text, migrations)
 }
@@ -206,6 +210,10 @@ define_query!(
     SETTINGS_QUERY_2025_04_15,
     migrations::m_2025_04_15::SETTINGS_PATTERNS
 );
+define_query!(
+    SETTINGS_QUERY_2025_04_21,
+    migrations::m_2025_04_21::SETTINGS_PATTERNS
+);
 
 // custom query
 static EDIT_PREDICTION_SETTINGS_MIGRATION_QUERY: LazyLock<Query> = LazyLock::new(|| {