Allow excluding analyzers globally (#1180)

* This change does not exclude analyzers for inline comment
* Changed the expected issues count for G103, G109 samples for test. Previously G115 has been included in the issue count
* Show analyzers IDs(G115, G602) in gosec usage help
* See #1175

testutils/g103_samples.go

@@ -27,7 +27,7 @@ func main() {
 	intPtr = (*int)(unsafe.Pointer(addressHolder))
 	fmt.Printf("\nintPtr=%p, *intPtr=%d.\n\n", intPtr, *intPtr)
 }
-`}, 3, gosec.NewConfig()},
+`}, 2, gosec.NewConfig()},
 	{[]string{`
 package main
 

testutils/g109_samples.go

@@ -20,7 +20,7 @@ func main() {
 	value := int32(bigValue)
 	fmt.Println(value)
 }
-`}, 2, gosec.NewConfig()},
+`}, 1, gosec.NewConfig()},
 	{[]string{`
 package main
 
@@ -38,7 +38,7 @@ func main() {
 		fmt.Println(bigValue)
 	}
 }
-`}, 2, gosec.NewConfig()},
+`}, 1, gosec.NewConfig()},
 	{[]string{`
 package main