tools: add debug entitlements for macOS 10.15+

To debug native modules node should be a debuggable process, that will
require the **com.apple.security.get-task-allow** entitlement to be
added to the codesign procedure.

PR-URL: #34378
Fixes: #34340
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

tools/osx-entitlements.plist

@@ -12,5 +12,7 @@
     <true/>
     <key>com.apple.security.cs.disable-library-validation</key>
     <true/>
+    <key>com.apple.security.get-task-allow</key>
+    <true/>
 </dict>
 </plist>