[master] Update dependencies from mono/linker (#45108)

* Update dependencies from https://github.com/mono/linker build 20201116.3

Microsoft.NET.ILLink.Tasks
 From Version 6.0.0-alpha.1.20561.1 -> To Version 6.0.0-alpha.1.20566.3

* Update tools to 5.0 RTM which is now required by illinker

The update was forced for linker because of dotnet/arcade#6547 automatic distribution. The same change were suppose to land in dotnet/runtime in #44835 but was reverted with no explanation in 6b86305

* Update dependencies from https://github.com/mono/linker build 20201130.1

Microsoft.NET.ILLink.Tasks
 From Version 6.0.0-alpha.1.20561.1 -> To Version 6.0.0-alpha.1.20580.1

* Update dependencies from https://github.com/mono/linker build 20201130.2

Microsoft.NET.ILLink.Tasks
 From Version 6.0.0-alpha.1.20561.1 -> To Version 6.0.0-alpha.1.20580.2

* Update dependencies from https://github.com/mono/linker build 20201130.3

Microsoft.NET.ILLink.Tasks
 From Version 6.0.0-alpha.1.20561.1 -> To Version 6.0.0-alpha.1.20580.3

* Update dependencies from https://github.com/mono/linker build 20201130.4

Microsoft.NET.ILLink.Tasks
 From Version 6.0.0-alpha.1.20561.1 -> To Version 6.0.0-alpha.1.20580.4

* Update dependencies from https://github.com/mono/linker build 20201130.5

Microsoft.NET.ILLink.Tasks
 From Version 6.0.0-alpha.1.20561.1 -> To Version 6.0.0-alpha.1.20580.5

* Revert "Update tools to 5.0 RTM which is now required by illinker"

This reverts commit 9532380.

* Update dependencies from https://github.com/mono/linker build 20201201.1

Microsoft.NET.ILLink.Tasks
 From Version 6.0.0-alpha.1.20561.1 -> To Version 6.0.0-alpha.1.20601.1

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: Marek Safar <marek.safar@gmail.com>

eng/Version.Details.xml

@@ -190,9 +190,9 @@
  <Uri>https://github.com/dotnet/runtime</Uri>
  <Sha>38017c3935de95d0335bac04f4901ddfc2718656</Sha>
  </Dependency>
- <Dependency Name="Microsoft.NET.ILLink.Tasks" Version="6.0.0-alpha.1.20561.1">
+ <Dependency Name="Microsoft.NET.ILLink.Tasks" Version="6.0.0-alpha.1.20601.1">
  <Uri>https://github.com/mono/linker</Uri>
- <Sha>8ee2557ccbaf9e4cf243f15b8cb95da4eddb18aa</Sha>
+ <Sha>4ddaa381cb8b374ce07598250197dcfc728455c2</Sha>
  </Dependency>
  <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Xunit" Version="1.0.0-prerelease.20576.3">
  <Uri>https://github.com/dotnet/xharness</Uri>

eng/Versions.props

@@ -151,7 +151,7 @@
  <!-- Docs -->
  <MicrosoftPrivateIntellisenseVersion>5.0.0-preview-20201009.2</MicrosoftPrivateIntellisenseVersion>
  <!-- ILLink -->
- <MicrosoftNETILLinkTasksVersion>6.0.0-alpha.1.20561.1</MicrosoftNETILLinkTasksVersion>
+ <MicrosoftNETILLinkTasksVersion>6.0.0-alpha.1.20601.1</MicrosoftNETILLinkTasksVersion>
  <!-- ICU -->
  <MicrosoftNETCoreRuntimeICUTransportVersion>6.0.0-alpha.1.20580.2</MicrosoftNETCoreRuntimeICUTransportVersion>
  <!-- Mono LLVM -->