ci: Add gtest_10x test runner

[breezewish]

What problem does this PR solve?

Issue Number: ref #6233

Problem Summary:

What is changed and how it works?

Currently unit test is slow, takes 30 minutes in CI. Slow comes from:

1. Each test requires tear-up and tear-down, takes nearly 2s, even if the test case cost 1ms.
2. Some tests are very slow, takes 10+ minutes to finish.

This PR introduce a new test runner called gtest_10x, 10x faster by:

1. Batch tests, one tear-up and tear-down for multiple tests.
2. Reject tests who takes > 1 minute to complete (rejected about 1.5% of all tests).
3. Isolate each tests to run in a different working directory so that tests from the same test suites can be run concurrently.

Additional features:

1. Auto rerun tests multiple times to suffer from flaky tests.

Usage:

python3 tests/gtest_10x.py cmake-build-Debug/dbms/gtests_dbms

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

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[ti-chi-bot]

@breezewish: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-unit-test	1286a26	link	true	/test pull-unit-test

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