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>

internal/config/certsinfo.go

@@ -38,6 +38,7 @@ func printName(names []pkix.AttributeTypeAndValue, buf *strings.Builder) []strin
 	values := []string{}
 	for _, name := range names {
 		oid := name.Type
+		//nolint:gocritic
 		if len(oid) == 4 && oid[0] == 2 && oid[1] == 5 && oid[2] == 4 {
 			switch oid[3] {
 			case 3: