Switch to libz-rs-sys for zlib implementation

.github/workflows/ci.yaml

@@ -15,7 +15,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  CARGO_ARGS: --no-default-features --features stdlib,zlib,importlib,encodings,sqlite,ssl
+  CARGO_ARGS: --no-default-features --features stdlib,importlib,encodings,sqlite,ssl
   # Skip additional tests on Windows. They are checked on Linux and MacOS.
   # test_glob: many failing tests
   # test_io: many failing tests

.github/workflows/cron-ci.yaml

@@ -6,7 +6,7 @@ on:
 name: Periodic checks/tasks
 
 env:
-  CARGO_ARGS: --no-default-features --features stdlib,zlib,importlib,encodings,ssl,jit
+  CARGO_ARGS: --no-default-features --features stdlib,importlib,encodings,ssl,jit
   PYTHON_VERSION: "3.13.1"
 
 jobs:
@@ -24,7 +24,7 @@ jobs:
           python-version: ${{ env.PYTHON_VERSION }}
       - run: sudo apt-get update && sudo apt-get -y install lcov
       - name: Run cargo-llvm-cov with Rust tests.
-        run: cargo llvm-cov --no-report --workspace --exclude rustpython_wasm --verbose --no-default-features --features stdlib,zlib,importlib,encodings,ssl,jit
+        run: cargo llvm-cov --no-report --workspace --exclude rustpython_wasm --verbose --no-default-features --features stdlib,importlib,encodings,ssl,jit
       - name: Run cargo-llvm-cov with Python snippets.
         run: python scripts/cargo-llvm-cov.py
         continue-on-error: true

.github/workflows/release.yml

@@ -16,7 +16,7 @@ permissions:
   contents: write
 
 env:
-  CARGO_ARGS: --no-default-features --features stdlib,zlib,importlib,encodings,sqlite,ssl
+  CARGO_ARGS: --no-default-features --features stdlib,importlib,encodings,sqlite,ssl
 
 jobs:
   build: