Reland "WebNN: Define convTranspose2d operator in mojo"

This is a reland of commit fb8bb6697abaa081a4debb8e8de09e6dd444ca18

Since the WebNN GPU backend now supports running WPT tests on
win11-blink-rel bots and this CL was not updated the WPT baseline when
it was merged. So this reland CL updates the WPT baseline.

Original change's description:
> WebNN: Define convTranspose2d operator in mojo
>
> The convTranspose2d [1] is to compute a 2-D transposed convolution given
> 4-D input and filter tensors.
>
> Validate the convTranspose2d operator with converting the attributes
> from mojo to component library type and add unit tests to verify the
> graph from renderer process.
>
> [1] https://www.w3.org/TR/webnn/#api-mlgraphbuilder-convtranspose2d
>
> Bug: 1273291
> Change-Id: I39c07af05af2f7043e2d4d72f70a77d800e18d69
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4952434
> Reviewed-by: Jiewei Qian <qjw@chromium.org>
> Commit-Queue: Bin Miao <bin.miao@intel.com>
> Reviewed-by: Alex Gough <ajgo@chromium.org>
> Reviewed-by: Rafael Cintron <rafael.cintron@microsoft.com>
> Reviewed-by: ningxin hu <ningxin.hu@intel.com>
> Cr-Commit-Position: refs/heads/main@{#1221353}

Bug: 1273291
Change-Id: I7b89cd71238177beb439342d8dac2b0df690e60b
Cq-Include-Trybots: luci.chromium.try:win11-blink-rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5016350
Reviewed-by: ningxin hu <ningxin.hu@intel.com>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Reviewed-by: Rafael Cintron <rafael.cintron@microsoft.com>
Commit-Queue: Bin Miao <bin.miao@intel.com>
Reviewed-by: Jiewei Qian <qjw@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1222757}