Add TargetHostName to QuicConnection

[rzikm]

Fixes #80508, also ports #82934 and #81631 to System.Net.Quic to unify behavior.

I discovered that we have some inconsistency in TargetHostName on SslStream side, we will report the encoded TargetHost on client side TargetHostName property and in client cert selection callback, but decoded on server side. So I made changes to always store user-provided TargetHost and encode it only for the parts we need it. I also added a SslStream test for cert validation with IDN domain.

Closes #55687 (added tests which exercise IDN in S.N.Q).

[dotnet-issue-labeler]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[rzikm]

/azp run coreclr-libraries outerloop

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[rzikm]

/azp list

[azure-pipelines]

CI/CD Pipelines for this repository:

• runtime-coreclr outerloop
• runtime-coreclr jitstress
• runtime-coreclr jitstressregs
• runtime-coreclr jitstress2-jitstressregs
• runtime-coreclr gcstress0x3-gcstress0xc
• runtime-coreclr gcstress-extra
• runtime-coreclr r2r-extra
• runtime-coreclr jitstress-isas-x86
• runtime-coreclr jitstress-isas-arm
• runtime-coreclr jitstressregs-x86
• runtime-coreclr libraries-jitstressregs
• runtime-coreclr libraries-jitstress2-jitstressregs
• runtime-coreclr r2r
• runtime-coreclr runincontext
• runtime-coreclr crossgen2
• runtime-libraries-coreclr outerloop
• runtime-libraries-coreclr outerloop-windows
• runtime-libraries-coreclr outerloop-linux
• runtime-libraries-coreclr outerloop-osx
• runtime
• runtime-libraries enterprise-linux
• runtime-libraries stress-http
• runtime-libraries stress-ssl
• runtime-dev-innerloop
• runtime-coreclr crossgen2 outerloop
• coreclr-release-outerloop-nightly
• runtime-coreclr crossgen2-composite
• runtime-jit-experimental
• runtime-coreclr libraries-jitstress
• dotnet-linker-tests
• runtime-coreclr ilasm
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• runtime-staging
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• Antigen
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• runtime-coreclr superpmi-replay
• runtime-wasm
• runtime-coreclr superpmi-diffs
• runtime-coreclr superpmi-asmdiffs-checked-release
• runtime-extra-platforms
• jit-cfg
• runtime-wasm-perf
• runtime-llvm
• runtime-coreclr jitstress-random
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• runtime-android-grpc-client-tests
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• runtime-android
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[rzikm]

/azp run runtime-libraries-coreclr outerloop

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Azure Pipelines successfully started running 1 pipeline(s).

[rzikm]

CI Failures are:

• [wasm] interpreter timeouts when WebSocket closes unexpectedly #84101
• WasmTestOnBrowser-System.Text.Json.Tests.WorkItemExecution timing out #84434
• System.Net.Http.Enterprise.Tests build failing in CI #85035
• CI System.Text.RegularExpressions.Tests failure #84323

And more outerloop tests, all unrelated (System.Formats.Tar, System.Runtime.Numerics, ...)

[rzikm]

/azp run runtime-libraries-coreclr outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ManickaP]

Some comments, but looks good in general, thanks!
BTW, does this also fixes #55687 or is there still something else that needs to be done?

[rzikm]

BTW, does this also fixes #55687 or is there still something else that needs to be done?

I think this should close it, MsQuic is actually encoding/decoding punycode for us.

[ManickaP]

LGTM, thank you!

[rzikm]

/azp run runtime-libraries-coreclr outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[rzikm]

/azp run runtime-libraries-coreclr outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[rzikm]

/azp run runtime-libraries-coreclr outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[rzikm]

Known test failures:
❌WasmTestOnBrowser-System.Text.Json.Tests.WorkItemExecution and 1 more hits - #84101
❌System.Text.RegularExpressions.Tests.RegexMatchTests.StressTestDeepNestingOfLoops and 1 more hits - #84323
❌System.Formats.Tar.Tests.WorkItemExecution and 1 more hits - #84101

• Test failure System.Diagnostics.Tests.ProcessStartInfoTests.StartInfo_NotepadWithContent_withArgumentList(useShellExecute: True) #68246

Newly filed (unrelated to this PR)

• [TestFailure] System.Diagnostics.Metrics.Tests.MetricEventSourceTests.EventSourcePublishesAllDataTypes #85290

And many others (wasm and/or unrelated to SslStream/Quic)

[wfurt]

LGTM