internal/rosa: key-value type

This type is used very frequently. The new type is much easier to type and can receive helper methods eventually if needed.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/rsync.go

@@ -15,7 +15,7 @@ func (t Toolchain) newRsync() (pkg.Artifact, string) {
 	), &PackageAttr{
 		Flag: TEarly,
 	}, &MakeHelper{
-		Configure: [][2]string{
+		Configure: []KV{
 			{"disable-openssl"},
 			{"disable-xxhash"},
 			{"disable-zstd"},