Support quantized Clamp and Max Pooling operators in Subgraph API

PiperOrigin-RevId: 391221452
diff --git a/BUILD.bazel b/BUILD.bazel
index 346dc84..c0557b1 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -7177,8 +7177,6 @@
         "//conditions:default": [],
     }),
     defines = [
-        "XNN_NO_S8_OPERATORS",
-        "XNN_NO_U8_OPERATORS",
         "XNN_NO_F16_OPERATORS",
         "XNN_NO_X16_OPERATORS",
     ] + select({
@@ -7186,18 +7184,22 @@
         ":xnn_enable_qs8_explicit_false": [
             "XNN_NO_QC8_OPERATORS",
             "XNN_NO_QS8_OPERATORS",
+            "XNN_NO_S8_OPERATORS",
         ],
         "//conditions:default": [
             "XNN_NO_QC8_OPERATORS",
             "XNN_NO_QS8_OPERATORS",
+            "XNN_NO_S8_OPERATORS",
         ],
     }) + select({
         ":xnn_enable_qu8_explicit_true": [],
         ":xnn_enable_qu8_explicit_false": [
             "XNN_NO_QU8_OPERATORS",
+            "XNN_NO_U8_OPERATORS",
         ],
         "//conditions:default": [
             "XNN_NO_QU8_OPERATORS",
+            "XNN_NO_U8_OPERATORS",
         ],
     }),
     gcc_copts = xnnpack_gcc_std_copts(),