[grid] Set savefile.default_directory for Chrome (#12109)

This allows PDF printing to the managed downloads directory when using
Chrome with the --kiosk-printing flag.

Fixes #12092

Co-authored-by: Diego Molina <[email protected]>

Author: ShadowLNC

java/src/org/openqa/selenium/grid/node/local/LocalNode.java

@@ -533,6 +533,8 @@ private Capabilities setDownloadsDirectory(UUID uuid, Capabilities caps) {
               "download.prompt_for_download",
               false,
               "download.default_directory",
+              tempDir.getAbsolutePath(),
+              "savefile.default_directory",
               tempDir.getAbsolutePath());
       String optionsKey = Browser.CHROME.is(caps) ? "goog:chromeOptions" : "ms:edgeOptions";
       return appendPrefs(caps, optionsKey, map);