Fixes segmentation fault cross compile on macOS

```sh
9.676 internal/bytealg: /opt/app-root/src/go/pkg/tool/linux_amd64/asm: signal: segmentation fault (core dumped)
12.78 cloud.google.com/go/storage/internal: /opt/app-root/src/go/pkg/tool/linux_amd64/compile: signal: segmentation fault (core dumped)
```

similar to fix seen at https://github.com/replicatedhq/local-volume-provider/pull/66/files#diff-5b6228cfe643850b0b1c8d2b5d69430bb121272e145b651c2ff6a85c23895b4eR1
for replicatedhq/local-volume-provider#65 (comment)

Signed-off-by: Tiger Kaovilai <[email protected]>

Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM quay.io/konveyor/builder:ubi9-latest AS builder
+FROM --platform=$BUILDPLATFORM quay.io/konveyor/builder:ubi9-latest AS builder
 ARG TARGETOS
 ARG TARGETARCH