Refactor fileresolver to not require base path (#4298)

* ref: close source in test and examples

Signed-off-by: Kudryavcev Nikolay <kydry.nikolau@gmail.com>

* ref: pretty file/directory source resolver (make them more similar)

Signed-off-by: Kudryavcev Nikolay <kydry.nikolau@gmail.com>

* ref: move absoluteSymlinkFreePathToParent to file resolver

Signed-off-by: Kudryavcev Nikolay <kydry.nikolau@gmail.com>

* revert breaking change

Signed-off-by: Kudryavcev Nikolay <kydry.nikolau@gmail.com>

---------

Signed-off-by: Kudryavcev Nikolay <kydry.nikolau@gmail.com>

examples/create_simple_sbom/main.go

@@ -19,6 +19,7 @@ const defaultImage = "alpine:3.19"
 func main() {
 	// automagically get a source.Source for arbitrary string input
 	src := getSource(imageReference())
+	defer src.Close()
 
 	// catalog the given source and return a SBOM
 	sbom := getSBOM(src)
@@ -40,7 +41,6 @@ func imageReference() string {
 
 func getSource(input string) source.Source {
 	src, err := syft.GetSource(context.Background(), input, nil)
-
 	if err != nil {
 		panic(err)
 	}