Fix CI: Use cargo-hack 0.6.10 (#1468)

* Fix ci: Install deps before caching and include `JUST*` env values in caching key

To make sure caching is done properly and does not accidentally include
(old) pre-built binaries that we don't want.

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* Fix missing `shell`

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* Fix justfile target `check`: Call `cargo hack check` directly

without using the `CARGO=cargo-zigbuild` env since `leon` does not use
external C/C++ compiler anyway.

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

* CI: Dowgrade cargo-hack to 0.6.10

This is the last version working

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

---------

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

.github/actions/just-setup/action.yml

@@ -53,7 +53,12 @@ runs:
       fi
     shell: bash
 
+  - run: just ci-install-deps
+    shell: bash
+
   - if: inputs.indexcache || inputs.buildcache
     uses: Swatinem/rust-cache@v2
+    with:
+      env-vars: "CARGO CC CFLAGS CXX CMAKE RUST JUST"
     env:
       RUSTFLAGS: ${{ steps.retrieve-rustflags.outputs.RUSTFLAGS }}