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/heal/heal.go

@@ -86,7 +86,7 @@ func (opts Config) Wait(currentIO func() int, systemIO func() int) {
 				} else {
 					time.Sleep(waitTick)
 				}
-				tmpMaxWait = tmpMaxWait - waitTick
+				tmpMaxWait -= waitTick
 			}
 			if tmpMaxWait <= 0 {
 				return