Auto merge of #27806 - jonathanKingston:secure-contexts-with-creation-url, r=jdm

Add creation url and Secure Contexts

A more complete version of https://github.com/servo/servo/pull/27793

I've added in creation/creator URLs to match the HTML spec for the "global settings object" which doesn't exist in Servo but lots of its concepts exist within the Global Scope.

This fixes the previously mentioned blob url test fails but has the previously mentioned issues in https://github.com/servo/servo/pull/27793

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