[wasm] workaround test results corruption

[pavelsavara]

• Apply xharness bump with changes from
  • [wasm] write test as single line via base64 xharness#771
  • [wasm] fix XML header encoding xharness#772
• sending the XML directly, without JSON
• waiting for WS buffer to be empty before sending WASM EXIT. This is bit pointless because it goes into the same WS buffer, on the other hand, we know that we reached that point before the browser process was stopped.

Fixes#61749

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Tagging subscribers to this area: @Anipik, @safern, @ViktorHofer
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Issue Details

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• Apply xharness bump with changes from [wasm] workaround corrupted test results file xharness#769
• run full matrix CI build

In hope that it fixes or surfaces more the issue #61749

Author:	pavelsavara
Assignees:	-
Labels:	area-Infrastructure-libraries
Milestone:	-

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Tagging subscribers to 'arch-wasm': @lewing
See info in area-owners.md if you want to be subscribed.

Issue Details

---

• Apply xharness bump with changes from [wasm] workaround corrupted test results file xharness#769
• run full matrix CI build

In hope that it fixes or surfaces more the issue #61749

Author:	pavelsavara
Assignees:	-
Labels:	arch-wasm, area-Infrastructure-libraries
Milestone:	-

[maraf]

LGTM 🤞

[lewing]

Looks good once the test changes are reverted

[pavelsavara]

Error while saving testResults.xml System.Xml.XmlException: Data at the root level is invalid. Line 2, position 1.

[pavelsavara]

Work in progress here dotnet/xharness#771

[pavelsavara]

Will need new nuget binaries from dotnet/xharness#771

[pavelsavara]

/azp run runtime-manual

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[pavelsavara]

/azp run runtime-manual

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[pavelsavara]

@radical@maraf@lewing I think this fixes XML corruption problem for WASM.
There are few failed tests for WASM, but I believe they have other causes, Ankit could you please confirm I got it right ?

@premun I know that you are working on bumping all other dependencies too in #61668 shall we wait for that instead of merging it here ?

[premun]

Please merge it here

[radical]

You can ignore the Wasm/Windows/AOT tests.

[radical]

You can ignore the Wasm/Windows/WBT tests also. I am disabling them in #61937 .