Added support for object urls to URLListValidator.js

[igzThomasFrischholz]

URLListValidator did not support Object-URLs which lead to misbehaviour in some classes. (e.g PDFViewer could not load files from object urls)

This PR aims to fix this issue by adding a regex check and decompose into the validate method of URLListValidator.js
A separate Unit-Test for the desired behavior has been added as well.

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[flovogt]

Thanks a lot for your PR. The team will have a look at it!
Internally tracked via DINC0162093.

[boghyon]

blob: URLs are generally considered as insecure as unsafe-eval (See w3c/webappsec-csp@0f497cb and https://www.w3.org/TR/CSP2/#source-list-guid-matching) and might not be explicitly allowed by the CSP configuration set in e.g. Fiori launchpad sites.