ci: Add testing for NetBSD

The x86-64 NetBSD target is tier 2, so we can start testing it.

(backport <#4782>)
(cherry picked from commit d77b8e7)

Author: tgross35

.github/workflows/ci.yaml

@@ -261,6 +261,7 @@ jobs:
       matrix:
         include:
           - target: x86_64-pc-solaris
+          - target: x86_64-unknown-netbsd
     timeout-minutes: 25
     steps:
       - uses: actions/checkout@v5
@@ -281,6 +282,26 @@ jobs:
             export PATH=$HOME/.rust_solaris/bin:$PATH
             ./ci/run.sh ${{ matrix.target }}
 
+      - name: Test on NetBSD
+        uses: vmactions/netbsd-vm@v1
+        if: contains(matrix.target, 'netbsd')
+        with:
+          release: "10.1"
+          usesh: true
+          mem: 4096
+          copyback: false
+          prepare: |
+            set -x
+            /usr/sbin/pkg_add curl
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- \
+              --profile minimal --default-toolchain nightly -y
+          run: |
+            set -x
+            . "$HOME/.cargo/env"
+            which rustc
+            rustc -Vv
+            ./ci/run.sh ${{ matrix.target }}
+
   docs:
     name: Ensure docs build
     runs-on: ubuntu-24.04