Setup for CI

• Comment out problematic packages from the workspace Cargo.toml
• Make the simple3 juno sample also a test
• Add support to the juno! macro for compiling Hercules IR directly, so that we can make the hercules_samples also tests (matmul, dot, fac)
• Fix an issue with inlining

.gitlab-ci.yml

+build-job:
+  stage: build
+  script:
+    - cargo build
+
+test-job:
+  stage: test
+  script:
+    - cargo test