Replace clang format with dotnet format for C# files (#30377)

.pre-commit-config.yaml

@@ -70,8 +70,16 @@ repos:
       description: clang-format
       entry: 'inv pre-commit.check-winclang-format'
       language: system
-      types_or: [c, c++, c#]
+      types_or: [c, c++]
       pass_filenames: false
+    - # dotnet format is available on Linux, see https://learn.microsoft.com/en-us/dotnet/core/install/linux
+      id: dotnet-format-installer
+      name: dotnet-format-installer
+      description: Format .net file of the MSI installer
+      language: system
+      # The dotnet format tool requires a solution file to operate.
+      entry: dotnet format ./tools/windows/DatadogAgentInstaller --include 
+      types: [c#]
     - id: go-mod-tidy
       name: go-mod-tidy
       description: check that all go.mod files are tidy

tools/windows/DatadogAgentInstaller/.editorconfig

@@ -6,7 +6,13 @@
 indent_style = space
 tab_width = 4
 indent_size = 4
-end_of_line = crlf
+
+# unset = native (let the platform decide)
+# see https://github.com/editorconfig/editorconfig/wiki/EditorConfig-Properties#end_of_line
+#   > 'if you want to use native line endings between different operating systems it is better not to set this option and leave that task to the VCS'
+# and
+# https://github.com/editorconfig/editorconfig/issues/226
+# end_of_line = crlf
 
 #### .NET Coding Conventions ####