build: Produce a Windows arm64 binary (#35461)

Author: xiehan

.changes/v1.15/NEW FEATURES-20250926-164134.yaml

@@ -0,0 +1,5 @@
+kind: NEW FEATURES
+body: We now produce builds for Windows ARM64
+time: 2025-09-26T16:41:34.771437+02:00
+custom:
+    Issue: "32719"

.github/workflows/build.yml

@@ -121,6 +121,7 @@ jobs:
           - {goos: "solaris", goarch: "amd64", runson: "ubuntu-latest", cgo-enabled: "0"}
           - {goos: "windows", goarch: "386", runson: "ubuntu-latest", cgo-enabled: "0"}
           - {goos: "windows", goarch: "amd64", runson: "ubuntu-latest", cgo-enabled: "0"}
+          - {goos: "windows", goarch: "arm64", runson: "ubuntu-latest", cgo-enabled: "0"}
           - {goos: "darwin", goarch: "amd64", runson: "ubuntu-latest", cgo-enabled: "0"}
           - {goos: "darwin", goarch: "arm64", runson: "ubuntu-latest", cgo-enabled: "0"}
       fail-fast: false