Cert pinning is not enforced on Desktop

[fmarier]

Upstream recently changed how pinning is gated and when we merged that change, we added a fixed timestamp of Wed 13 Apr 2022 05:00:00 PM PDT. That stopped working a few weeks later because at that point the list is considered stale after 10 weeks.

Test URL (in Brave's pinning list): https://ssl-pinning.someblog.org/

[fmarier]

I created a PR to do this manually, but the real fix is to automate updating this timestamp.

[fmarier]

To prevent future regressions:

• Add TLS cert pinning to the QA smoketests qa-resources#450
• Add a browser test for cert pinning #24455

[LaurenWags]

Requires 1.43.62 or above to test

[stephendonner]

Verified PASSED using

Brave	1.43.62 Chromium: 104.0.5112.81 (Official Build) beta (x86_64)
Revision	5b7b76419d50f583022568b6764b630f6ddc9208-refs/branch-heads/5112@{#1309}
OS	macOS Version 11.6.8 (Build 20G730)

Steps:

1. installed 1.43.62
2. launched Brave
3. loaded https://ssl-pinning.someblog.org/
4. clicked on Advanced

Confirmed I got the certificate-pinning error message

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[MadhaviSeelam]

Verification PASSED using

Brave | 1.43.63 Chromium: 104.0.5112.81 (Official Build) beta (64-bit)
-- | --
Revision | 5b7b76419d50f583022568b6764b630f6ddc9208-refs/branch-heads/5112@{#1309}
OS | Windows 11 Version 21H2 (Build 22000.795)

• install 1.43.63
• launch Brave
• visit https://ssl-pinning.someblog.org/

Verified pinning error message shown as expected

dark	light