test(fuzz): appease goimports by renaming added .go corpus files to *…

…go_fuzz (#3602)

goimports doesn't provide an ignore pattern except by reading the
$GOPATH/.goimportsignore which would be too cumbersome and non-standard
to muck around with so instead this change modifies testdata/corpra/*.go
to testdata/corpora/*.go_fuzz so that goimports won't throw a fit
against CI/CD for this project.

Fixes #3601

gnovm/pkg/gnolang/fuzz_test.go

@@ -50,8 +50,8 @@ func FuzzConvertUntypedBigdecToFloat(f *testing.F) {
 
 func FuzzParseFile(f *testing.F) {
 	// 1. Add the corpra.
-	parseFileDir := filepath.Join("testdata", "corpra", "parsefile")
-	paths, err := filepath.Glob(filepath.Join(parseFileDir, "*.go"))
+	parseFileDir := filepath.Join("testdata", "corpora", "parsefile")
+	paths, err := filepath.Glob(filepath.Join(parseFileDir, "*.go_fuzz"))
 	if err != nil {
 		f.Fatal(err)
 	}