Bug 1690981 [wpt PR 27500] - CSP: Remove 'plugin-types' directive, a=testonly

Bug 1690981 [wpt PR 27500] - CSP: Remove 'plugin-types' directive, a=testonly

Automatic update from web-platform-tests
CSP: Remove 'plugin-types' directive

The Content Security Policy directive 'plugin-types' is being removed
by the specification
(https://github.com/w3c/webappsec-csp/pull/456). This CL removes the
code parsing and checking the 'plugin-types' directive from Blink and
from the services/network CSP parser. All WP tests for plugin-types
are removed, too.

When parsing a plugin-types directive, we display a console error
message informing that the directive has been removed and that
object-src can be used instead.

Bug: 1168001
Change-Id: I61420677a0f11f8daf46c473e578d66c932751d1
Cq-Do-Not-Cancel-Tryjobs: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643282
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Antonio Sartori <antoniosartori@chromium.org>
Cr-Commit-Position: refs/heads/master@{#851760}

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wpt-commits: 8959b13684b68186781340c044d9c1b62a388358
wpt-pr: 27500