Skip flatbuffer verification in some cases

[atuchin-m]

Replaces #728

The idea is to provide ability to skip flatbuffer verification for the browser startup when we load/create a DAT file with the same version the engine version + DAT seahash matches.
It technically allows to create a memory corruption for attacker with a write access, but it's out of the Chromium threat model:

We consider these attacks outside Chrome's threat model, because there is no way for Chrome (or any application) to defend against a malicious user who has managed to log into your device as you, or who can run software with the privileges of your operating system user account.

link

[github-actions]

Rust Benchmark

Details

Benchmark suite	Current: eb8bb64	Previous: 1c0740d	Ratio
rule-match-browserlike/brave-list	1913704476 ns/iter (± 7176275)	1924967612 ns/iter (± 7805929)	0.99
rule-match-first-request/brave-list	1366356 ns/iter (± 17578)	1345618 ns/iter (± 43788)	1.02
blocker_new/brave-list	111387021 ns/iter (± 251095)	111587961 ns/iter (± 336549)	1.00
blocker_new/brave-list-deserialize	1987937 ns/iter (± 7625)	31531323 ns/iter (± 2045870)	0.06304641895298843
memory-usage-final/brave-list-initial	9671732 B/iter (± 0)	9671732 B/iter (± 0)	1
memory-usage-final/brave-list-1000-requests	3215263 B/iter (± 0)	3215263 B/iter (± 0)	1
memory-usage-max/brave-list-initial/max	32237425 B/iter (± 0)	32237425 B/iter (± 0)	1
memory-usage-alloc-count/brave-list-initial/alloc-count	287123 allocs/iter (± 0)	287123 allocs/iter (± 0)	1
memory-usage-alloc-count/brave-list-1000-requests/alloc-count	81427 allocs/iter (± 0)	81427 allocs/iter (± 0)	1
url_cosmetic_resources/brave-list	185646 ns/iter (± 2284)	187013 ns/iter (± 766)	0.99
cosmetic-class-id-match/brave-list	3263172 ns/iter (± 892942)	3336389 ns/iter (± 836749)	0.98

This comment was automatically generated by workflow using github-action-benchmark.

[antonok-edm]

it would be good to have a way to override the crate versions used in these expected_hash tests. As it stands they will now need to be updated for every new version bump.

[atuchin-m]

I've updated these tests to verify hash without the header.
Now we don't need to update the values when we do a bump.