reqwest_client: Fix socks proxy settings (#19123)

Closes #19362

This pull request includes several updates to the `reqwest_client` crate
and its dependencies. The most important changes involve adding support
for SOCKS proxies, improving error handling for proxy URIs, and adding
tests for proxy functionality.

### Dependency Updates:
*
[`Cargo.toml`](diffhunk://#diff-2e9d962a08321605940b5a657135052fbcef87b5e360662bb527c96d9a615542L394-R401):
Added support for SOCKS proxies in the `reqwest` dependency by including
the `socks` feature.

### Code Improvements:
*
[`crates/reqwest_client/src/reqwest_client.rs`](diffhunk://#diff-8e036b034e987390be2f57373864b75d6983f0cf84e85c43793eb431d13538f3L47-R52):
Improved error handling when parsing proxy URIs by logging errors
instead of directly panicking.

### Testing Enhancements:
*
[`crates/reqwest_client/src/reqwest_client.rs`](diffhunk://#diff-8e036b034e987390be2f57373864b75d6983f0cf84e85c43793eb431d13538f3R274-R317):
Added tests to verify the handling of various proxy URIs, including
valid and invalid cases.

Release Notes:

- N/A

crates/reqwest_client/src/reqwest_client.rs

@@ -44,8 +44,12 @@ impl ReqwestClient {
         let mut client = reqwest::Client::builder()
             .use_rustls_tls()
             .default_headers(map);
-        if let Some(proxy) = proxy.clone() {
-            client = client.proxy(reqwest::Proxy::all(proxy.to_string())?);
+        if let Some(proxy) = proxy.clone().and_then(|proxy_uri| {
+            reqwest::Proxy::all(proxy_uri.to_string())
+                .inspect_err(|e| log::error!("Failed to parse proxy URI {}: {}", proxy_uri, e))
+                .ok()
+        }) {
+            client = client.proxy(proxy);
         }
         let client = client.build()?;
         let mut client: ReqwestClient = client.into();
@@ -232,3 +236,47 @@ impl http_client::HttpClient for ReqwestClient {
         .boxed()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use http_client::{http, HttpClient};
+
+    use crate::ReqwestClient;
+
+    #[test]
+    fn test_proxy_uri() {
+        let client = ReqwestClient::new();
+        assert_eq!(client.proxy(), None);
+
+        let proxy = http::Uri::from_static("http://localhost:10809");
+        let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
+        assert_eq!(client.proxy(), Some(&proxy));
+
+        let proxy = http::Uri::from_static("https://localhost:10809");
+        let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
+        assert_eq!(client.proxy(), Some(&proxy));
+
+        let proxy = http::Uri::from_static("socks4://localhost:10808");
+        let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
+        assert_eq!(client.proxy(), Some(&proxy));
+
+        let proxy = http::Uri::from_static("socks4a://localhost:10808");
+        let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
+        assert_eq!(client.proxy(), Some(&proxy));
+
+        let proxy = http::Uri::from_static("socks5://localhost:10808");
+        let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
+        assert_eq!(client.proxy(), Some(&proxy));
+
+        let proxy = http::Uri::from_static("socks5h://localhost:10808");
+        let client = ReqwestClient::proxy_and_user_agent(Some(proxy.clone()), "test").unwrap();
+        assert_eq!(client.proxy(), Some(&proxy));
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_invalid_proxy_uri() {
+        let proxy = http::Uri::from_static("file:///etc/hosts");
+        ReqwestClient::proxy_and_user_agent(Some(proxy), "test").unwrap();
+    }
+}