* Enable saving test dlls with environment variable
This will help with investigations for runtime async and other areas where we simply want to get the exact assembly the compiler is producing under test.
* Reuse existing infrastructure, remove unused method.
* Clarify comment
* Restore dump funcion

...001.1 (dotnet#80539)
[main] Update dependencies from dotnet/arcade

* Reduce allocations in SourceText.ToString
This method was using a PooledStringBuilder to do it's string buildup. When a PooledStringBuilder's underlying StringBuilder exceeeds 1024, it is no longer returned to the pool upon completion. SourceText.ToString results commonly exceeed 1024 characters. To better improve those cases, we can use string.Create directly to avoid the StringBuilder altogether.
This accounts for about 0.6% of all allocations in the RoslynCodeAnalysisService process in the razor CompletionInCohosting speedometer test.

...ronment variable handling (dotnet#80498)
* Initial plan
* Fix thread safety issue in BuildServerConnection.TryCreateServer environment variable handling
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* Address review comments: Pass environment variables as parameter and fix CREF
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* Address review feedback: Fix whitespace, add DOTNET_ROOT(x86) test, improve logging
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* Apply suggestion from @jaredpar
* Apply suggestion from @jaredpar
* Apply suggestion from @jaredpar
* Fix CreateProcess error: Add CREATE_UNICODE_ENVIRONMENT flag and fix blank lines
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* Improve comment: Explain why double null terminator is needed in environment block
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* Add explanatory comments per code review feedback
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* Fix: Clear DOTNET_ROOT_* variants to prevent inheritance on Linux
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* Update comment: Clarify that Windows API requires sorted environment variables
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---------
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)

...when file moved (dotnet#80535)
* Add test demonstrating issue with document context in FBP
* Fix GetTextDocumentAsync returning misc document preferentially over host document
* fixes
* Alternative approach: Remove from misc files and re-lookup document
* Reword comment
* Review feedback

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...alse` operators are used

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Co-authored-by: CyrusNajmabadi <4564579+CyrusNajmabadi@users.noreply.github.com>

Co-authored-by: CyrusNajmabadi <4564579+CyrusNajmabadi@users.noreply.github.com>

...Tests.cs

...xpression (dotnet#80724)

...ltiple locations include generated code" (dotnet#80713)
* Revert "Update tests"
This reverts commit 3a0fb03.
* Revert "remove"
This reverts commit c25cc57.
* Revert "Add using"
This reverts commit 62b83be.
* Revert "Address code review feedback: inline variable, remove unused using, add WorkItem"
This reverts commit 071da44.
* Revert "Remove redundant inline comments from GetPreferredNonGeneratedLocationAsync"
This reverts commit a150e3c.
* Revert "Use IsGeneratedCodeAsync extension method to simplify code"
This reverts commit abe9a83.
* Revert "Add test for Go To Definition with partial user and generated code"
This reverts commit 1317f68.
* Revert "Implement Go To Definition preference for non-generated code"
This reverts commit 4a4c3a3.

...ct references
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dotnet#80531)

...ction-expression-arguments