convert uses of interface{} to any

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

PiperOrigin-RevId: 487033228

tools/checkaligned/checkaligned.go

@@ -59,7 +59,7 @@ var blocklist = []string{
 	"SwapUint32",
 }
 
-func run(pass *analysis.Pass) (interface{}, error) {
+func run(pass *analysis.Pass) (any, error) {
 	// Check for the "// +checkalignedignore" escape hatch.
 	for _, file := range pass.Files {
 		if file.Doc == nil {