ci: add riscv64 native wheel build using RISE runners

Add manylinux_riscv64 to the wheel build matrix using RISE RISC-V
native runners (RISCV64 label) instead of QEMU emulation.

Also allow the workflow to run on the riseproject-dev fork.

Signed-off-by: Bruno Verachten <gounthar@gmail.com>

Author: gounthar

.github/workflows/wheels.yml

@@ -27,7 +27,7 @@ jobs:
   build_wheels:
     name: Build wheel ${{ matrix.python }}-${{ matrix.buildplat[1] }}-${{ matrix.buildplat[2] }}
     # To enable this job on a fork, comment out:
-    if: github.repository == 'numpy/numpy'
+    if: github.repository == 'numpy/numpy' || github.repository == 'riseproject-dev/numpy'
     runs-on: ${{ matrix.buildplat[0] }}
     strategy:
       fail-fast: false
@@ -39,6 +39,7 @@ jobs:
           - [ubuntu-22.04, musllinux_x86_64, ""]
           - [ubuntu-22.04-arm, manylinux_aarch64, ""]
           - [ubuntu-22.04-arm, musllinux_aarch64, ""]
+          - [RISCV64, manylinux_riscv64, ""]
           - [macos-15-intel, macosx_x86_64, openblas]
           - [macos-14, macosx_arm64, openblas]
           - [windows-2022, win_amd64, ""]