buck2_server_commands: remove deprecated chrono::DateTime::from_utc

Summary:
Chrono deprecated this method in 0.4.27 which was released recently:
* https://github.com/chronotope/chrono/releases/tag/v0.4.27
* chronotope/chrono#1175

And our Cargo builds started to fail with:
```
use of deprecated associated function "chrono::DateTime::<Tz>::from_utc"
```

Reviewed By: wendy728

Differential Revision: D48785434

fbshipit-source-id: d3911b72d533fb7b1d9fd5995edf764cd828b447

Cargo.toml

@@ -122,7 +122,7 @@ bumpalo = "3.11.1"
 byteorder = "1.4.3"
 bytes = "1.0"
 bytesize = "1.1.0"
-chrono = "0.4.19"
+chrono = "0.4.28"
 clap = { version = "3.2.24", features = ["derive", "env"] }
 common-path = "1.0.0"
 compact_str = "0.6.1"

app/buck2_server_commands/src/commands/install.rs

@@ -72,7 +72,6 @@ use buck2_server_ctx::pattern::target_platform_from_client_context;
 use buck2_server_ctx::template::run_server_command;
 use buck2_server_ctx::template::ServerCommandTemplate;
 use buck2_util::process::background_command;
-use chrono::DateTime;
 use chrono::NaiveDateTime;
 use chrono::Utc;
 use dice::DiceComputations;
@@ -302,14 +301,10 @@ fn get_random_tcp_port() -> anyhow::Result<u16> {
     Ok(tcp_port)
 }
 
-// `DateTime::from_utc` is deprecated in the latest version, it suggests
-// use `TimeZone::from_utc_datetime()` or `DateTime::from_naive_utc_and_offset`
-// but these are not yet available in fbsource third-parties.
-#[allow(deprecated)]
 fn get_timestamp_as_string() -> anyhow::Result<String> {
     let nt = NaiveDateTime::from_timestamp_opt(Utc::now().timestamp(), 0)
         .context(InstallError::NativeDateTime)?;
-    let dt: DateTime<Utc> = DateTime::from_utc(nt, Utc);
+    let dt = nt.and_utc();
     Ok(dt.format("%Y%m%d-%H%M%S").to_string())
 }
 

shim/third-party/rust/Cargo.toml

@@ -45,7 +45,7 @@ bumpalo = "=3.11.1"
 byteorder = "1.4.3"
 bytes = "1.0"
 bytesize = "1.1.0"
-chrono = "=0.4.19"  # Avoid a dependency iana-time-zone, which requires a fixup
+chrono = "0.4.28"
 clap = { package = "clap", version = "4.0.7", features = ["derive", "env"] }
 clap-3 = { package = "clap", version = "3.2.24", features = ["derive", "env"] }
 common-path = "1.0.0"