Test Improvement - CSP - Experimental, sandbox, report-to

[cockroacher]

Feature/improvement

We should add validation of all standard CSP policies: other_supported_polices = ['report-to','sandbox','upgrade-insecure-requests']

We should add validation of experimental policies.

experimental_policies = [
     'fenced-frame-src',
     'require-trusted-types-for',
     'inline-speculation-rules',
     'trusted-types']