Fix some Thread Network Diagnostics XML/ZAP issues. (#21692)

* Rename "ChannelMask" to "ChannelPage0Mask" to align with spec.
* Rename "delay" to "Delay" to align with spec.
* Add SecurityPolicy and OperationalDatasetComponents to the "must be external"
  list, since they are struct-typed.
diff --git a/zzz_generated/bridge-app/zap-generated/endpoint_config.h b/zzz_generated/bridge-app/zap-generated/endpoint_config.h
index b0b251e..e11b58e 100644
--- a/zzz_generated/bridge-app/zap-generated/endpoint_config.h
+++ b/zzz_generated/bridge-app/zap-generated/endpoint_config.h
@@ -344,11 +344,11 @@
             { 0x00000039, ZAP_TYPE(INT64U), 8, ZAP_ATTRIBUTE_MASK(EXTERNAL_STORAGE) | ZAP_ATTRIBUTE_MASK(NULLABLE),                \
               ZAP_EMPTY_DEFAULT() }, /* PendingTimestamp */                                                                        \
             { 0x0000003A, ZAP_TYPE(INT32U), 4, ZAP_ATTRIBUTE_MASK(EXTERNAL_STORAGE) | ZAP_ATTRIBUTE_MASK(NULLABLE),                \
-              ZAP_EMPTY_DEFAULT() }, /* delay */                                                                                   \
+              ZAP_EMPTY_DEFAULT() }, /* Delay */                                                                                   \
             { 0x0000003B, ZAP_TYPE(STRUCT), 0, ZAP_ATTRIBUTE_MASK(EXTERNAL_STORAGE) | ZAP_ATTRIBUTE_MASK(NULLABLE),                \
               ZAP_EMPTY_DEFAULT() }, /* SecurityPolicy */                                                                          \
             { 0x0000003C, ZAP_TYPE(OCTET_STRING), 5, ZAP_ATTRIBUTE_MASK(EXTERNAL_STORAGE) | ZAP_ATTRIBUTE_MASK(NULLABLE),          \
-              ZAP_EMPTY_DEFAULT() }, /* ChannelMask */                                                                             \
+              ZAP_EMPTY_DEFAULT() }, /* ChannelPage0Mask */                                                                        \
             { 0x0000003D, ZAP_TYPE(STRUCT), 0, ZAP_ATTRIBUTE_MASK(EXTERNAL_STORAGE) | ZAP_ATTRIBUTE_MASK(NULLABLE),                \
               ZAP_EMPTY_DEFAULT() }, /* OperationalDatasetComponents */                                                            \
             { 0x0000003E, ZAP_TYPE(ARRAY), 0, ZAP_ATTRIBUTE_MASK(EXTERNAL_STORAGE),                                                \