Allow build with VS2022 installed

[BrennanConroy]

No description provided.

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this PR. If you have write-permissions please help me learn by adding exactly one area label.

[danmoseley]

Seems reasonable, if it works for you.

[danmoseley]

@dotnet/dnceng

Found results file /root/helix/work/workitem/testResults.xml with format xunit
Searching '/root/helix/work/workitem/uploads' for test results files
Worker 0: got error: Traceback (most recent call last):
  File "/root/helix/work/correlation/reporter/run.py", line 44, in run
    self.__process(item)
  File "/root/helix/work/correlation/reporter/run.py", line 34, in __process
    self.publisher.upload_batch(batch)
  File "/root/helix/work/correlation/reporter/azure_devops_result_publisher.py", line 35, in upload_batch
    self.publish_results(test_case_results, test_name_order, results_with_attachments)
  File "/root/helix/work/correlation/reporter/azure_devops_result_publisher.py", line 70, in publish_results
    published_results = test_client.add_test_results_to_test_run(list(test_case_results), self.team_project, self.test_run_id)  # type: List[TestCaseResult]
  File "/home/helixbot/.azdo-env/lib/python3.8/site-packages/azure/devops/v5_1/test/test_client.py", line 675, in add_test_results_to_test_run
    response = self._send(http_method='POST',
  File "/home/helixbot/.azdo-env/lib/python3.8/site-packages/azure/devops/client.py", line 104, in _send
    response = self._send_request(request=request, headers=headers, content=content, media_type=media_type)
2021-05-08 02:21:31,904: INFO: 140019813375304: run(114): main: Main thread exiting
  File "/home/helixbot/.azdo-env/lib/python3.8/site-packages/azure/devops/client.py", line 68, in _send_request
    self._handle_error(request, response)
  File "/home/helixbot/.azdo-env/lib/python3.8/site-packages/azure/devops/client.py", line 271, in _handle_error
    raise AzureDevOpsClientRequestError(full_message_format.format(error_message=error_message,
azure.devops.exceptions.AzureDevOpsClientRequestError: Operation returned an invalid status code of 503.

https://helixre8s23ayyeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-52487-merge-591b81bc58264264ae/Microsoft.Extensions.Hosting.Unit.Tests/console.eb866017.log?sv=2019-07-07&se=2021-05-28T01%3A55%3A10Z&sr=c&sp=rl&sig=0iKoGlNoY%2FhKlVjDU6ls%2FvKAGPmUMKuX3aUpndBIneY%3D

[danmoseley]

The other issue is #52527.

[danmoseley]

thanks @BrennanConroy

[lpatalas]

@danmoseley Regarding the failure you linked above #52487 (comment) - it's probably intermittent AzDO issue. @MattGal elaborated a bit more about it here: #52420 (comment).

[ViktorHofer]

cc @AntonLapounov

should we also update

runtime/eng/native/gen-buildsys.cmd

Lines 31 to 32 in 403ae35

	if /i "%__VSVersion%" == "vs2019" (set __CmakeGenerator=%__CmakeGenerator% 16 2019)
	if /i "%__VSVersion%" == "vs2017" (set __CmakeGenerator=%__CmakeGenerator% 15 2017)

or change it so that it doesn't hardcode the VS versions?

[AntonLapounov]

At present CMake has no special support for Visual Studio 2022, so we should probably use "Visual Studio 16 2019" unconditionally for now. The vs2017 line may be deleted.