[PS-40] Upgrade to .NET 6 (#2056)

* Bump to .NET 6

* Update Docker images

* Update docs

* Update workflow for linter

* Add all common versions to props file

* Update tools manifest

* Update csproj files

* Update packages.lock.json files

* Switch to setup-dotnet

* Remove msbuild

* Fix deps breaking changes

* Manually install msbuild

* Use msbuild for build

* Fix verbosity switch

* Remove unused exceptions

* Address linter feedback

* Make Obsolete warnings suggestions for now.

* Force Evaluate

* Format on tests

* Run formatting again.

* Use windows 2022

* force evaluate

* Fix restore

* Fix linter

* Skip test

* Update Directory.Build.props

Co-authored-by: Matt Gibson <mgibson@bitwarden.com>

* Address PR feedback

* Add IntegationTest for Rate limiter

* Fix test

* Reenable test

* Reorder test

* Skip test again

* Add tracking link

* Update .github/workflows/build.yml

Co-authored-by: Micaiah Martin <77340197+mimartin12@users.noreply.github.com>

Co-authored-by: Matt Gibson <mgibson@bitwarden.com>
Co-authored-by: Micaiah Martin <77340197+mimartin12@users.noreply.github.com>

.github/workflows/build.yml

@@ -35,33 +35,28 @@ jobs:
       - name: Checkout repo
         uses: actions/checkout@a12a3943b4bdde767164f792f33f40b04645d846
 
-      # TODO: This can be removed when upgrading to .NET 6
-      - name: Restore tools
-        run: dotnet tool restore
-
       - name: Verify Format
-        run: dotnet tool run dotnet-format --check
+        run: dotnet format --verify-no-changes
 
 
   testing:
     name: Testing
-    runs-on: windows-2019
+    runs-on: windows-2022
     env:
       NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
     steps:
-      - name: Set up NuGet
-        uses: nuget/setup-nuget@04b0c2b8d1b97922f67eca497d7cf0bf17b8ffe1
+      - name: Set up dotnet
+        uses: actions/setup-dotnet@9211491ffb35dd6a6657ca4f45d43dfe6e97c829
         with:
-          nuget-version: '5'
-
+          dotnet-version: '6.0.x'
       - name: Set up MSBuild
         uses: microsoft/setup-msbuild@ab534842b4bdf384b8aaf93765dc6f721d9f5fab
 
       - name: Print environment
         run: |
-          nuget help | grep Version
-          msbuild -version
           dotnet --info
+          msbuild -version
+          nuget help | grep Version
           echo "GitHub ref: $GITHUB_REF"
           echo "GitHub event: $GITHUB_EVENT"
 
@@ -69,18 +64,13 @@ jobs:
         uses: actions/checkout@a12a3943b4bdde767164f792f33f40b04645d846
 
       - name: Restore
-        run: msbuild /t:restore /p:RestoreLockedMode=true
+        run: dotnet restore --locked-mode
         shell: pwsh
 
       - name: Build solution
         run: msbuild bitwarden-server.sln /p:Configuration=Debug /verbosity:minimal
         shell: pwsh
 
-      # TODO: This can be removed when upgrading to .NET 6
-      - name: Restore tools
-        run: dotnet tool restore
-        shell: pwsh
-
       - name: Test OSS solution
         run: dotnet test ./test --configuration Debug --no-build
         shell: pwsh