[code-review] Fix paths for code generated stuff (#34357)

missed a `/lib/` on a few paths...

.gitattributes

@@ -31,9 +31,9 @@ tools/run_tests/tests.json linguist-generated=true
 tools/run_tests/generated/tests.json linguist-generated=true
 tools/run_tests/generated/sources_and_headers.json linguist-generated=true
 src/core/lib/security/credentials/tls/grpc_tls_credentials_options.h linguist-generated=true
-src/core/debug/stats_data.h linguist-generated=true
-src/core/debug/stats_data.cc linguist-generated=true
-src/core/experiments/experiments.h linguist-generated=true
-src/core/experiments/experiments.cc linguist-generated=true
+src/core/lib/debug/stats_data.h linguist-generated=true
+src/core/lib/debug/stats_data.cc linguist-generated=true
+src/core/lib/experiments/experiments.h linguist-generated=true
+src/core/lib/experiments/experiments.cc linguist-generated=true
 bazel/experiments.bzl linguist-generated=true
 test/cpp/microbenchmarks/huffman_geometries/** linguist-generated=true