include/package-pack: translate PKGARCH for APK

include/package-pack: translate PKGARCH for APK

We have a lot of script-only packages that are universal for all arch-s
and those set PKGARCH:=all to indicate it.

Unfortunately, APK expects architecture to be set to "noarch" instead to
indicate that its universal so instead of having to update all packages
that set PKGARCH:=all and thus break OPKG lets simply translate "all" to
"noarch" when generating the APK package.

This will be required as soon we update APK to include [1] as it will start
enforcing package architecture checks.

[1] https://gitlab.alpinelinux.org/alpine/apk-tools/-/commit/c1a3e69f24e235fc78f4dddb1f85fdf281464446

Suggested-by: Jonas Gorski <jonas.gorski@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17015
Signed-off-by: Robert Marko <robimarko@gmail.com>