fix: pkg changes for wrappers using cargo-pgrx 0.12.6

[samrose]

What kind of change does this PR introduce?

The original error

error: A hash was specified for clickhouse-rs-1.0.0-alpha.1, but there is no corresponding git dependency.

was resolved by

  cargoLock = {
    lockFile = "${src}/Cargo.lock";
    allowBuiltinFetchGit = true;
  };

The newer version of the buildPgxExtension was able just to use the lockfile and the builtin fetch git capability.

In addition I added env vars for building on macOS

  env = lib.optionalAttrs stdenv.isDarwin {
    POSTGRES_LIB = "${postgresql}/lib";
    RUSTFLAGS = "-C link-arg=-undefined -C link-arg=dynamic_lookup";
    PGPORT = "5435";
  };

These weren't needed with the previous version of cargo-pgrx builder, but they are now. Similar to what we have here https://github.com/supabase/wrappers/blob/v0.4.3/.cargo/config.toml gave PGPORT a unique number which helps tests pass and avoid collisions.

I also bumped up the version of rust in the packages to 1.80.0 which

Added NIX_LDFLAGS = "-L${postgresql}/lib -lpq"; for when linking, to look in PostgreSQL's lib directory and link against the PostgreSQL client library