Run amd64 CI on Ubuntu 20.04

Tests that use LD_PRELOAD hang on Ubuntu 22.04 GitHub runners

.github/workflows/amd64.yml

@@ -11,15 +11,15 @@ env:
 jobs:
   ubuntu-latest:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v4
     - name: Build
       run: cargo build --all-features --verbose
     - name: Run tests
       run: |
-        sudo apt update && sudo apt install -y gdb pip curl python3.10-dev llvm \
+        sudo apt update && sudo apt install -y gdb pip curl python3.9-dev llvm \
             openjdk-17-jdk ca-certificates gnupg
         pip3 install atheris
         sudo mkdir -p /etc/apt/keyrings

.github/workflows/coverage.yaml

@@ -11,13 +11,13 @@ env:
 jobs:
   ubuntu-latest:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v4
     - name: Install Dependences
       run: |
-        sudo apt update && sudo apt install -y gdb pip curl python3.10-dev llvm \
+        sudo apt update && sudo apt install -y gdb pip curl python3.9-dev llvm \
             openjdk-17-jdk ca-certificates gnupg
         pip3 install atheris
         sudo mkdir -p /etc/apt/keyrings

casr/tests/tests.rs

@@ -4233,7 +4233,6 @@ fn test_casr_java() {
 }
 
 #[test]
-#[ignore]
 #[cfg(target_arch = "x86_64")]
 fn test_casr_java_native_lib() {
     let paths = [