[pkg/stanza] Fix tests on Windows (#32305)

Fix tests failing in
https://github.com/open-telemetry/opentelemetry-collector-contrib/actions/runs/8637187949/job/23678820573

Resolves
#32299

pkg/stanza/fileconsumer/matcher/matcher_test.go

@@ -715,35 +715,35 @@ func TestMatcher(t *testing.T) {
 		{
 			name: "Recursive match - include",
 			files: []string{
-				"a/1.log",
-				"a/2.log",
-				"a/b/1.log",
-				"a/b/2.log",
-				"a/b/c/1.log",
-				"a/b/c/2.log",
-			},
-			include: []string{"**/1.log"},
+				filepath.Join("a", "1.log"),
+				filepath.Join("a", "2.log"),
+				filepath.Join("a", "b", "1.log"),
+				filepath.Join("a", "b", "2.log"),
+				filepath.Join("a", "b", "c", "1.log"),
+				filepath.Join("a", "b", "c", "2.log"),
+			},
+			include: []string{filepath.Join("**", "1.log")},
 			exclude: []string{},
 			expected: []string{
-				"a/1.log",
-				"a/b/1.log",
-				"a/b/c/1.log",
+				filepath.Join("a", "1.log"),
+				filepath.Join("a", "b", "1.log"),
+				filepath.Join("a", "b", "c", "1.log"),
 			},
 		},
 		{
 			name: "Recursive match - include and exclude",
 			files: []string{
-				"a/1.log",
-				"a/2.log",
-				"a/b/1.log",
-				"a/b/2.log",
-				"a/b/c/1.log",
-				"a/b/c/2.log",
-			},
-			include: []string{"**/1.log"},
-			exclude: []string{"**/b/**/1.log"},
+				filepath.Join("a", "1.log"),
+				filepath.Join("a", "2.log"),
+				filepath.Join("a", "b", "1.log"),
+				filepath.Join("a", "b", "2.log"),
+				filepath.Join("a", "b", "c", "1.log"),
+				filepath.Join("a", "b", "c", "2.log"),
+			},
+			include: []string{filepath.Join("**", "1.log")},
+			exclude: []string{filepath.Join("**", "b", "**", "1.log")},
 			expected: []string{
-				"a/1.log",
+				filepath.Join("a", "1.log"),
 			},
 		}}