22.8.15 Backport of #53286 - Bring back dns tests #298
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Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Three tests were failing / flaky:
test_host_regexp_multiple_ptr_records
test_host_regexp_multiple_ptr_records_concurrent
test_reverse_dns_query
Hard coding coredns version to 1.9.3 (latest version of coredns when these tests were introduced) fixed 1 and 2. The latter was failing because we relied on google dns, but that can fail sometimes. To fix this, I simply setup a DNS server for this test as well. It does not rely on 3rd party stuff anymore.
Backport ClickHouse#53286
Documentation entry for user-facing changes