Replace isahc with async ureq (#18414)

REplace isahc with ureq everywhere gpui is used.

This should allow us to make http requests without libssl; and avoid a
long-tail of panics caused by ishac.

Release Notes:

- (potentially breaking change) updated our http client

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Co-authored-by: Mikayla <mikayla@zed.dev>

crates/http_client/Cargo.toml

@@ -16,7 +16,9 @@ path = "src/http_client.rs"
 doctest = true
 
 [dependencies]
-http = "0.2"
+http = "1.1"
+rustls.workspace = true
+rustls-native-certs.workspace = true
 anyhow.workspace = true
 derive_more.workspace = true
 futures.workspace = true