convert uses of interface{} to any

Done via:
  find . -name "*.go" | xargs sed -i -E 's/interface\{\}/any/g'

PiperOrigin-RevId: 487033228

pkg/compressio/compressio.go

@@ -58,13 +58,13 @@ import (
 )
 
 var bufPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		return bytes.NewBuffer(nil)
 	},
 }
 
 var chunkPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		return new(chunk)
 	},
 }

pkg/compressio/compressio_test.go

@@ -27,9 +27,9 @@ import (
 )
 
 type harness interface {
-	Errorf(format string, v ...interface{})
-	Fatalf(format string, v ...interface{})
-	Logf(format string, v ...interface{})
+	Errorf(format string, v ...any)
+	Fatalf(format string, v ...any)
+	Logf(format string, v ...any)
 }
 
 func initTest(t harness, size int) []byte {