feat: Return full rlimit (#301)

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#### Summary

Related to https://github.com/cloudquery/cloudquery-issues/issues/372 returns full access to rlimit info on process

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helpers/limit/limits.go

@@ -9,16 +9,21 @@ const (
 	goroutinesPerGB float64 = 250000
 )
 
+type Rlimit struct {
+	Cur uint64
+	Max uint64
+}
+
 func GetMaxGoRoutines() uint64 {
 	limit := calculateGoRoutines(getMemory())
-	ulimit, err := getUlimit()
-	if err != nil || ulimit == 0 {
+	ulimit, err := GetUlimit()
+	if err != nil || ulimit.Max == 0 {
 		return limit
 	}
-	if ulimit > limit {
+	if ulimit.Max > limit {
 		return limit
 	}
-	return ulimit
+	return ulimit.Max
 }
 
 func getMemory() uint64 {

helpers/limit/ulimit_unix.go

@@ -6,8 +6,8 @@ import (
 	"syscall"
 )
 
-func getUlimit() (uint64, error) {
+func GetUlimit() (Rlimit, error) {
 	var rLimit syscall.Rlimit
 	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
-	return rLimit.Max, err
+	return Rlimit{rLimit.Cur, rLimit.Max}, err
 }

helpers/limit/ulimit_win.go

@@ -2,6 +2,6 @@
 
 package limit
 
-func getUlimit() (uint64, error) {
-	return 0, nil
+func GetUlimit() (Rlimit, error) {
+	return Rlimit{0, 0}, nil
 }