Change tab URL calculation for contentblockerrules.js and surrogates.js

[jonathanKingston]

Please review the release process for BrowserServicesKit here.

Required:

Task/Issue URL: #1019 and https://app.asana.com/0/1200437802575119/1208550540369943/f
iOS PR: TODO
macOS PR: TODO
What kind of version bump will this require?: Minor

Optional:

Tech Design URL:
CC:

Description:

This PR changes the tab calculation for the page, currently it doesn't account for grand child frames at all.
This code has mostly been cribbed from: https://github.com/duckduckgo/content-scope-scripts/blob/655d12d9e77f93cc36875142aa2ff3e06c52608d/injected/src/utils.js#L135-L157

Full disclosure: I tested this manually in the console rather than doing a full build, we should verify before releasing.

Thanks to @alisha for spotting this problem in #1019, producing a well written explanation and PR!

Steps to test this PR:
For testing the blocking follow the steps in: #1019 using the console.

For surrogates the same should work for a tracker on the surrogate list:

• replacing https://rtb.openx.net/openrtbb/prebidjs with https://google-analytics.com/gtm/js
• validating that frame has the script executed: cframe.contentWindow.ga should be defined

OS Testing:

• iOS 14
• iOS 15
• iOS 16
• macOS 10.15
• macOS 11
• macOS 12

---

Internal references:

Software Engineering Expectations
Technical Design Template

[brindy]

As discussed, looks better than it did. :)