chore: add rustflags for Linux target in Cargo configuration

Author: burmecia

.cargo/config.toml

@@ -1,3 +1,7 @@
 [target.'cfg(target_os="macos")']
 # Postgres symbols won't be available until runtime
 rustflags = ["-Clink-arg=-Wl,-undefined,dynamic_lookup"]
+
+[target.'cfg(target_os="linux")']
+# Postgres symbols won't be available until runtime
+rustflags = ["-Clink-arg=-Wl,--unresolved-symbols=ignore-all"]