Bug 1864594 [wpt PR 43140] - WebNN: Support 0-D scalars, a=testonly

Automatic update from web-platform-tests
WebNN: Support 0-D scalars

This CL fixes the WebNN spec and implementation issue [1] and allows to
present a 0-D scalar operand by empty dimensions.

This CL also adds test cases for MLGraphBuilder, XNNPACK backend, WebNN
service and DirectML backend for 0-D scalar operand.

[1]: webmachinelearning/webnn#390

Bug: 1498803, 1273291
Change-Id: Ic30602d6a1cdbe38ca3d384ffb7d8fe053b0a5a7
Cq-Include-Trybots: luci.chromium.try​:win11-blink-rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5029273
Reviewed-by: Jiewei Qian <qjwchromium.org>
Reviewed-by: Rafael Cintron <rafael.cintronmicrosoft.com>
Commit-Queue: ningxin hu <ningxin.huintel.com>
Reviewed-by: Weizhong Xia <weizhonggoogle.com>
Cr-Commit-Position: refs/heads/main{#1225264}

--

wpt-commits: 9a15f9f5814ac064c27ec9089acda4028b2518f8
wpt-pr: 43140

UltraBlame original commit: 7d5c3104db5385083454b56cf36201a8278bb1cc

testing/web-platform/tests/webnn/resources/test_data/pow.json

@@ -1665,10 +1665,10 @@ base
 tensor
 and
 broadcastable
-1D
+0D
 integer
 exponent
-tensor
+scalar
 "
 "
 inputs
@@ -1799,7 +1799,6 @@ shape
 "
 :
 [
-1
 ]
 "
 data
@@ -1951,10 +1950,10 @@ base
 tensor
 and
 broadcastable
-1D
+0D
 integer
 exponent
-tensor
+scalar
 "
 "
 inputs
@@ -2072,7 +2071,6 @@ shape
 "
 :
 [
-1
 ]
 "
 data