Release version 8 of AMP cache transforms. (#565)

PiperOrigin-RevId: 388316442

Author: twifkak

transformer/versions.go

@@ -12,7 +12,7 @@ import (
 // snapshotted to a finalized version.
 // The ranges should be non-overlapping and in descending order.
 // Visible for test.
-var SupportedVersions = []*rpb.VersionRange{{Min: 1, Max: 7}}
+var SupportedVersions = []*rpb.VersionRange{{Min: 1, Max: 8}}
 
 
 func min(a, b int64) int64 {