chore(crashtracking): add tag for target triple (#1741)

# What does this PR do?

At compile time, check target triple. Include this tag when we generate the payload for telemetry and errors intake upload

[PROF-14038](https://datadoghq.atlassian.net/jira/software/c/projects/PROF/boards/11?selectedIssue=PROF-14038)

# Motivation

It would be nice to tag reports based on this; especially given different reliability considerations between musl and glibc crashtracking

Trying to check libc is harder because many OS are ambiguous

# Additional Notes

Anything else we should know when reviewing?

# How to test the change?

Unit tests. 
```    
println!(
        "cargo:rustc-env=TARGET={}",
        std::env::var("TARGET").unwrap()
    );
```
The above always works when run in `build.rs` through cargo. The tests need to confirm that the value set by the build script is included in ddtags

[PROF-14038]: https://datadoghq.atlassian.net/browse/PROF-14038?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Co-authored-by: gyuheon.oh <gyuheon.oh@datadoghq.com>

Author: gyuheon0h

libdd-crashtracker/build.rs

@@ -114,6 +114,11 @@ fn build_cpp_file() {
 
 #[cfg(unix)]
 fn main() {
+    println!(
+        "cargo:rustc-env=TARGET={}",
+        std::env::var("TARGET").unwrap()
+    );
+
     cc::Build::new()
         .file("src/crash_info/emit_sicodes.c")
         .compile("emit_sicodes");
@@ -139,6 +144,11 @@ fn main() {
 
 #[cfg(not(unix))]
 fn main() {
+    println!(
+        "cargo:rustc-env=TARGET={}",
+        std::env::var("TARGET").unwrap()
+    );
+
     // Build CXX bridge if feature is enabled
     #[cfg(feature = "cxx")]
     build_cxx_bridge();

libdd-crashtracker/src/crash_info/errors_intake.rs

@@ -5,7 +5,9 @@ use std::time::SystemTime;
 
 use crate::{OsInfo, SigInfo};
 
-use super::{build_crash_ping_message, CrashInfo, Experimental, Metadata, StackTrace};
+use super::{
+    build_crash_ping_message, CrashInfo, Experimental, Metadata, StackTrace, TARGET_TRIPLE,
+};
 use anyhow::Context;
 use chrono::{DateTime, Utc};
 use http::{uri::PathAndQuery, Uri};
@@ -363,6 +365,7 @@ fn build_crash_info_tags(crash_info: &CrashInfo) -> String {
         append_signal_tags(&mut tags, siginfo);
     }
 
+    tags.push_str(&format!(",target_triple:{TARGET_TRIPLE}"));
     tags
 }
 
@@ -456,6 +459,8 @@ impl ErrorsIntakePayload {
             append_signal_tags(&mut ddtags, sig_info);
         }
 
+        ddtags.push_str(&format!(",target_triple:{TARGET_TRIPLE}"));
+
         let (error_type, message) = if let Some(sig_info) = sig_info {
             (
                 Some(format!("{:?}", sig_info.si_signo_human_readable)),
@@ -689,6 +694,7 @@ mod tests {
             "si_code_human_readable:SEGV_BNDERR",
             "si_signo:11",
             "si_signo_human_readable:SIGSEGV",
+            &format!("target_triple:{}", super::super::TARGET_TRIPLE),
         ];
 
         let expected_metadata_tags = ["service:foo", "version:bar", "language_name:native"];
@@ -726,8 +732,10 @@ mod tests {
             "si_code_human_readable:SEGV_BNDERR",
             "si_signo:11",
             "si_signo_human_readable:SIGSEGV",
+            &format!("target_triple:{}", super::super::TARGET_TRIPLE),
         ];
 
+        println!("payload.ddtags: {}", payload.ddtags);
         for tag in expected_tags {
             assert!(
                 payload.ddtags.contains(tag),

libdd-crashtracker/src/crash_info/mod.rs

@@ -17,6 +17,9 @@ mod telemetry;
 mod test_utils;
 mod unknown_value;
 
+// This is set compile time
+pub(crate) const TARGET_TRIPLE: &str = env!("TARGET");
+
 pub use builder::*;
 pub use error_data::*;
 pub use errors_intake::*;

libdd-crashtracker/src/crash_info/telemetry.rs

@@ -4,7 +4,7 @@ use std::{fmt::Write, time::SystemTime};
 
 use crate::{ErrorKind, SigInfo};
 
-use super::{CrashInfo, Metadata};
+use super::{CrashInfo, Metadata, TARGET_TRIPLE};
 use anyhow::Context;
 use chrono::{DateTime, Utc};
 use libdd_common::Endpoint;
@@ -396,6 +396,7 @@ impl TelemetryCrashUploader {
             ));
         }
 
+        write!(tags, ",target_triple:{TARGET_TRIPLE}").ok();
         self.append_optional_tags(&mut tags);
         tags
     }
@@ -448,6 +449,7 @@ fn extract_crash_info_tags(crash_info: &CrashInfo) -> anyhow::Result<String> {
             siginfo.si_signo_human_readable
         )?;
     }
+    write!(&mut tags, ",target_triple:{TARGET_TRIPLE}")?;
     Ok(tags)
 }
 
@@ -556,6 +558,7 @@ mod tests {
                 "si_signo_human_readable:SIGSEGV",
                 "si_signo:11",
                 "uuid:1d6b97cb-968c-40c9-af6e-e4b4d71e8781",
+                &format!("target_triple:{}", super::super::TARGET_TRIPLE),
             ]),
             tags
         );