Port to BoringSSL (part 2)

[alexey-milovidov]

Changelog category (leave one):

• Build/Testing/Packaging Improvement

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Change OpenSSL to BoringSSL. It allows to avoid issues with sanitizers. This fixes #12490. This fixes #17502. This fixes #12952.

Continuation of #16043

[alexey-milovidov]

Bonus: 6 times speedup.

[vzakaznikov]

For the TestFlows check error below you need to bump version to 1.6.72. I already have a PR for that
#18208.

✘ 56m 34s   [ Error  ] /clickhouse
    AttributeError
    Traceback (most recent call last):
      File "regression.py", line 23, in <module>
        regression()
      File "regression.py", line 20, in regression
        Feature(test=load("aes_encryption.regression", "regression"))(**args)
      File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
        return _bootstrap._gcd_import(name[level:], package, level)
      File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
      File "<frozen importlib._bootstrap>", line 991, in _find_and_load
      File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
      File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
      File "<frozen importlib._bootstrap_external>", line 783, in exec_module
      File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
      File "/ClickHouse/tests/testflows/aes_encryption/regression.py", line 9, in <module>
        from aes_encryption.requirements import *
      File "/ClickHouse/tests/testflows/aes_encryption/requirements/__init__.py", line 1, in <module>
        from .requirements import *
      File "/ClickHouse/tests/testflows/aes_encryption/requirements/requirements.py", line 9, in <module>
        Heading = Specification.Heading
    AttributeError: type object 'Specification' has no attribute 'Heading'