remove .NET Core SDK 7.0 (CI)

Author: Bertk

Directory.Packages.props

@@ -53,6 +53,7 @@
     <PackageVersion Include="xunit.assert" Version="2.9.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
     <PackageVersion Include="System.Buffers" Version="4.5.1" />
+    <PackageVersion Include="System.IO.Pipelines" Version="8.0.0" />
     <PackageVersion Include="System.Memory" Version="4.5.5" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="System.Security.Cryptography.Pkcs" Version="6.0.4" />

eng/azure-pipelines-nightly.yml

@@ -7,15 +7,10 @@ steps:
     version: 6.0.416
   displayName: Install .NET Core SDK 6.0.416
 
-- task: UseDotNet@2
-  inputs:
-    version: 8.0.101
-  displayName: Install .NET Core SDK 8.0.101
-
 - task: UseDotNet@2
   inputs:
     useGlobalJson: true
-  displayName: Install .NET Core SDK 8.0.100
+  displayName: Install .NET Core SDK 8.0.108
 
 - task: NuGetAuthenticate@1
   displayName: Authenticate with NuGet feeds

eng/build.yml

@@ -4,15 +4,10 @@ steps:
     version: 6.0.418
   displayName: Install .NET Core SDK 6.0.418
 
-- task: UseDotNet@2
-  inputs:
-    version: 7.0.405
-  displayName: Install .NET Core SDK 7.0.405
-
 - task: UseDotNet@2
   inputs:
     useGlobalJson: true
-  displayName: Install .NET Core SDK 8.0.101
+  displayName: Install .NET Core SDK 8.0.108
 
 # create artifact/package folder
 - pwsh: |