add gocritic/ruleguard checks back again, cleanup code. (#13665)

- remove some duplicated code
- reported a bug, separately fixed in #13664
- using strings.ReplaceAll() when needed
- using filepath.ToSlash() use when needed
- remove all non-Go style comments from the codebase

Co-authored-by: Aditya Manthramurthy <donatello@users.noreply.github.com>

cmd/endpoint-ellipses.go

@@ -242,7 +242,7 @@ func getTotalSizes(argPatterns []ellipses.ArgPattern) []uint64 {
 	for _, argPattern := range argPatterns {
 		var totalSize uint64 = 1
 		for _, p := range argPattern {
-			totalSize = totalSize * uint64(len(p.Seq))
+			totalSize *= uint64(len(p.Seq))
 		}
 		totalSizes = append(totalSizes, totalSize)
 	}