treewide: use APK compatible version schema

Different from OPKG, APK uses a deterministic version schema which chips
the version into chunks and compares them individually. This enforces a
certain schema which was previously entirely flexible.

 - Releases are added at the very and end prefixed with an `r` like
`1.2.3-r3`.
- Hashes are prefixed with a `~` like `1.2.3~abc123`.
- Dates become semantic versions, like `2024.04.01`
- Extra tags are possible like `_git`, `_alpha` and more.

For full details see the APK test list:
https://gitlab.alpinelinux.org/alpine/apk-tools/-/blob/master/test/version.data

Signed-off-by: Paul Spooren <mail@aparcar.org>

package/kernel/linux/Makefile

@@ -52,7 +52,7 @@ define Package/kernel
   CATEGORY:=Kernel
   DEFAULT:=y
   TITLE:=Virtual kernel package
-  VERSION:=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC)
+  VERSION:=$(LINUX_VERSION)~$(LINUX_VERMAGIC)-r$(LINUX_RELEASE)
   URL:=http://www.kernel.org/
   PKG_FLAGS:=nonshared
 endef