Move some CI-related scripts to github

[tavplubix]

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Changelog category (leave one):

• Not for changelog (changelog entry is not required)

Detailed description / Documentation draft:

1. Now tests tasks can write results into test_results.tsv file and check status into check_status.tsv. The first file should contain two or three columns (test name, result (OK or FAIL) and test time), each row is a result of some test. The second file should contain one row with check status to show on github, the first column is a status (success for green tick or failure for red cross) and the second column is text description. Task can put any logs into /test_output/ dir. All files from /test_output/ will be uploaded to s3 and attached to the report.
2. Part of integration tests runner moved from internal Yandex repository to GitHub
3. Check for hung queries is enabled for stress tests.

https://nda.ya.ru/t/hXTUekXP3krdjb

[tavplubix]

Stress test (address) - #21004
Stress test (thread) - something strange happened...

[tavplubix]

Stress test (memory) - ALTER TABLE mt_00763_1 MODIFY column s String; hung waiting for mutation

[tavplubix]

d5ea345:
Stress test (address) - SYSTEM SYNC REPLICA hung waiting on StorageReplicatedMergeTree::waitForShrinkingQueueSize
Stress test (thread) - SYSTEM RELOAD DICTIONARIES hung inside LoadingDispatcher::loadImpl

[tavplubix]

Stress test (address) - ALTER TABLE mt_00763_1 MODIFY column s UInt32 hung waiting for mutation - StorageMergeTree::waitForMutation
Stress test (thread) - WATCH test.lv EVENTS - #21004
Stress test (undefined) - ALTER TABLE collapsing_00682 DELETE WHERE k IN (1, 2) and alter table lc_empty_part_bug modify column s LowCardinality(String); - merges were stopped

[tavplubix]

f41e68d:
Stress test (address) - alter table lc_empty_part_bug modify column s LowCardinality(String) - StorageMergeTree::waitForMutation
Stress test (thread) - SELECT 2, count() FROM system.numbers - bad test 00600_replace_running_query
Stress test (undefined) - 2021.02.24 01:17:42.862194 [ 3599 ] {3816e576-c98e-47e8-8ab7-105aeb6978a8} <Error> TCPHandler: Code: 49, e.displayText() = DB::Exception: The old table was not completely removed from ZooKeeper, /clickhouse/tables/test_00993/alter_table still exists and may contain some garbage. But it should never happen according to the logic of operations (it's a bug).

3632c1d:
Stress test (address) - ALTER TABLE replicated_mutation_table MODIFY COLUMN value UInt64 SETTINGS replication_alter_partitions_sync = 2 - hung waiting for mutation which was killed
Stress test (thread) - SELECT 2, count() FROM system.numbers

[tavplubix]

Stress test (thread) - OOM

[alexey-milovidov]

Double whitespace.

[tavplubix]

As it should be. Output of gtest looks like this:

[----------] 4 tests from ColumnUnique
[ RUN      ] ColumnUnique.InsertRange
[       OK ] ColumnUnique.InsertRange (5810 ms)
[ RUN      ] ColumnUnique.InsertRangeWithOverflow
../src/Columns/tests/gtest_column_unique.cpp:83: Failure
Expected equality of these values:
  idx->size()
    Which is: 1000000
  num_values + 1
    Which is: 1000001
[  FAILED  ] ColumnUnique.InsertRangeWithOverflow (5937 ms)

[tavplubix]

Docs check - broken in master
Functional stateless tests flaky check - 00600_replace_running_query - looks unrelated, the test was bad before current changes
Integration tests (thread) - test_zookeeper_config/test.py::test_secure_connection - flaky