fix: strip publisher URL from RPM CPE vendor (#5081)

Signed-off-by: Eljees <yurytumanov.r@yandex.ru>

syft/pkg/cataloger/internal/cpegenerate/rpm_test.go

@@ -0,0 +1,60 @@
+package cpegenerate
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/anchore/syft/syft/pkg"
+)
+
+func TestCandidateVendorsForRPM(t *testing.T) {
+	tests := []struct {
+		name     string
+		metadata any
+		expected []string
+	}{
+		{
+			name: "database vendor with publisher URL",
+			metadata: pkg.RpmDBEntry{
+				Vendor: "SUSE LLC <https://www.suse.com/>",
+			},
+			expected: []string{"susellc"},
+		},
+		{
+			name: "archive vendor with publisher URL",
+			metadata: pkg.RpmArchive{
+				Vendor: "SUSE LLC <https://www.suse.com/>",
+			},
+			expected: []string{"susellc"},
+		},
+		{
+			name: "plain vendor",
+			metadata: pkg.RpmDBEntry{
+				Vendor: "Red Hat, Inc.",
+			},
+			expected: []string{"redhat"},
+		},
+		{
+			name: "non-URL angle-bracket suffix",
+			metadata: pkg.RpmDBEntry{
+				Vendor: "Example <support@example.com>",
+			},
+			expected: []string{"example<support@example.com>"},
+		},
+		{
+			name: "non-HTTP URL",
+			metadata: pkg.RpmDBEntry{
+				Vendor: "Example <ftp://example.com>",
+			},
+			expected: []string{"example<ftp://example.com>"},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			p := pkg.Package{Metadata: test.metadata}
+			assert.ElementsMatch(t, test.expected, candidateVendorsForRPM(p).uniqueValues())
+		})
+	}
+}