Rename Publish-EchoArgs to Publish-PSTestTools

* Rename Publish-EchoArgs to Publish-PSTestTools so it can be used
  for other tools as well in the future
* Publish EchoArgs to the bin directory instead of run to match
  convention
* Add source URL to EchoArgs header comment
* Use wildcard of "*.nuget.props" to match
  "test/csharp/csharp.nuget.props" in .gitignore

build.psm1

@@ -547,15 +547,16 @@ function Get-PesterTag {
     $o
 }
 
-function Publish-EchoArgs {
+function Publish-PSTestTools {
     [CmdletBinding()]
     param()
 
     Find-Dotnet
 
+    # Publish EchoArgs so it can be run by tests
     Push-Location "$PSScriptRoot/test/tools/EchoArgs"
     try {
-        dotnet publish --output run
+        dotnet publish --output bin
     } finally {
         Pop-Location
     }
@@ -577,8 +578,7 @@ function Start-PSPester {
     )
 
     Write-Verbose "Running pester tests at '$path' with tag '$($Tag -join ''', ''')' and ExcludeTag '$($ExcludeTag -join ''', ''')'" -Verbose
-    # Publish EchoArgs so it can be run by tests
-    Publish-EchoArgs
+    Publish-PSTestTools
     # All concatenated commands/arguments are suffixed with the delimiter (space)
     $Command = ""