fix(ci): remove Swatinem/rust-cache from maturin build jobs

Cached pyo3-build-config build scripts compiled on runners with
different CPU microarchitectures cause SIGILL on cache restore.
Remove rust-cache from python-test and numerical-equivalence jobs
where maturin builds in release mode.

Author: YuminosukeSato

.github/workflows/ci.yml

@@ -33,7 +33,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}

.github/workflows/numerical-equivalence.yml

@@ -25,7 +25,6 @@ jobs:
             repos='https://cloud.r-project.org'
           )"
       - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -58,7 +57,6 @@ jobs:
             repos='https://cloud.r-project.org'
           )"
       - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"