fix(pom): don't remove excluded deps from upper pom's

[DmitriyLewen]

Description

Fixed cases where we were removing excluded deps from upper pom's.
Example - aquasecurity/trivy#5827
Test to better understand the fix -

go-dep-parser/pkg/java/pom/parse_test.go

Lines 689 to 725 in bf1b2d1

	{
	name: "exclusions with wildcards",
	inputFile: filepath.Join("testdata", "wildcard-exclusions", "pom.xml"),
	local: true,
	want: []types.Library{
	{
	ID: "com.example:wildcard-exclusions:4.0.0",
	Name: "com.example:wildcard-exclusions",
	Version: "4.0.0",
	},
	{
	ID: "org.example:example-dependency2:2.3.4",
	Name: "org.example:example-dependency2",
	Version: "2.3.4",
	},
	{
	ID: "org.example:example-dependency:1.2.3",
	Name: "org.example:example-dependency",
	Version: "1.2.3",
	},
	{
	ID: "org.example:example-nested:3.3.3",
	Name: "org.example:example-nested",
	Version: "3.3.3",
	},
	},
	wantDeps: []types.Dependency{
	{
	ID: "com.example:wildcard-exclusions:4.0.0",
	DependsOn: []string{
	"org.example:example-dependency2:2.3.4",
	"org.example:example-dependency:1.2.3",
	"org.example:example-nested:3.3.3",
	},
	},
	},
	},

[knqyf263]

How about maps.Clone?

Suggested change

	exclusions := map[string]struct{}{}
	maps.Copy(exclusions, ex)
	exclusions := maps.Clone(ex)

[DmitriyLewen]

Looks like we will have enough of a hallow clone. Thank you!
Changed in cdc2c7f