build: Don't use aws-lc-rs for TLS

In #8053 it was agreed to use the ring backend in preference to
aws-lc-rs as it is pure Rust. However since aws-lc-rs is a default
feature of rustls the addition of ring was additive not a replacement.
Fix the features to exclude awc-lc-rs.

Signed-off-by: Rob Bradford <rbradford@meta.com>

Cargo.toml

@@ -96,7 +96,11 @@ itertools = "0.14.0"
 jiff = { version = "0.2", default-features = false, features = ["std"] }
 libc = "0.2.186"
 log = "0.4.30"
-rustls = { version = "0.23.40", features = ["ring"] }
+rustls = { version = "0.23.40", default-features = false, features = [
+  "logging",
+  "ring",
+  "std",
+] }
 sha2 = "0.11.0"
 signal-hook = "0.4.4"
 thiserror = "2.0.18"