refactor: use chrono::DateTime::from_timestamp (#23273)

`chrono::NaiveDateTime::from_timestamp_opt()` was deprecated in
chronotope/chrono#1473.

Prerequisite for #23272.

Author: iuioiua

cli/util/time.rs

@@ -14,10 +14,6 @@ pub fn utc_now() -> chrono::DateTime<chrono::Utc> {
   let now = std::time::SystemTime::now()
     .duration_since(std::time::UNIX_EPOCH)
     .expect("system time before Unix epoch");
-  let naive = chrono::NaiveDateTime::from_timestamp_opt(
-    now.as_secs() as i64,
-    now.subsec_nanos(),
-  )
-  .unwrap();
-  chrono::DateTime::from_naive_utc_and_offset(naive, chrono::Utc)
+  chrono::DateTime::from_timestamp(now.as_secs() as i64, now.subsec_nanos())
+    .unwrap()
 }

ext/cron/time.rs

@@ -10,10 +10,6 @@ pub fn utc_now() -> chrono::DateTime<chrono::Utc> {
   let now = std::time::SystemTime::now()
     .duration_since(std::time::UNIX_EPOCH)
     .expect("system time before Unix epoch");
-  let naive = chrono::NaiveDateTime::from_timestamp_opt(
-    now.as_secs() as i64,
-    now.subsec_nanos(),
-  )
-  .unwrap();
-  chrono::DateTime::from_naive_utc_and_offset(naive, chrono::Utc)
+  chrono::DateTime::from_timestamp(now.as_secs() as i64, now.subsec_nanos())
+    .unwrap()
 }

ext/kv/time.rs

@@ -10,10 +10,6 @@ pub fn utc_now() -> chrono::DateTime<chrono::Utc> {
   let now = std::time::SystemTime::now()
     .duration_since(std::time::UNIX_EPOCH)
     .expect("system time before Unix epoch");
-  let naive = chrono::NaiveDateTime::from_timestamp_opt(
-    now.as_secs() as i64,
-    now.subsec_nanos(),
-  )
-  .unwrap();
-  chrono::DateTime::from_naive_utc_and_offset(naive, chrono::Utc)
+  chrono::DateTime::from_timestamp(now.as_secs() as i64, now.subsec_nanos())
+    .unwrap()
 }