Update SignCheckExclusionsFile.txt syntax but disable signing validation for now

- validation may have other bugs and we should investigate separately

Author: dougbu

.azure/pipelines/ci.yml

@@ -590,4 +590,5 @@ stages:
     parameters:
       # See https://github.com/dotnet/arcade/issues/2871
       enableSymbolValidation: false
+      enableSigningValidation: false
       publishInstallersAndChecksums: true

eng/SignCheckExclusionsFile.txt

@@ -1,7 +1,4 @@
-content/**/apphost.exe;; Exclude the apphost because this is expected to be code-signed by customers after the SDK modifies it.
-*.js;; We do not sign JavaScript files.
-*.binlog;; MSBuild binary logs are not signed though they are sometimes placed where validation thinks they should be.
-*.otf;; We do not sign font files.
-*.ttf;;
-WixUIWixca;*.msi; We do not sign WiX content in our installers.
-WixDepCA;*.msi;
+apphost.exe;; Exclude the apphost because this is expected to be code-signed by customers after the SDK modifies it.
+.js;; We do not sign JavaScript files.
+.binlog;; MSBuild binary logs are not signed though they are sometimes placed where validation thinks they should be.
+WixUIWixca|WixDepCA;; We do not sign WiX content in our installers.