[js/web] enable webgpu in browser unit test (#16310)
### Description
enable webgpu in browser unit test.
The CI pipeline uses Edge v113+ which enables WebGPU.
===
**UPDATE on 08/07/2023:**
- add flags to Edge browser launch commandline so that Edge on CI agents
can initialize WebGPU correctly.
- ONLY enable webgpu on web release build. Other pipelines are using
flag `-b=wasm,webgl,xnnpack` to specify the other 3 backends explicitly.
- disable "Resize" related test failures. Once they are fixed the tests
can be re-enabled.
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Co-authored-by: Satya Jandhyala <satya.k.jandhyala@gmail.com>
