Alexey Milovidov ead40dd471 Run DockerC workers in separate containers ...

Start each `executable_pool` worker through `docker run` with its own FIFO directory instead of sharing one long-lived container and using `docker exec`.

Keep `CLICKHOUSE_C_DRIVER_CPUS` as a per-worker limit and clean up any worker containers by the generated `DockerC` prefix on drop.

Tests: python3 -m py_compile programs/server/user_defined_executable_function_drivers/c_driver_common.py

Tests: CLICKHOUSE_BINARY=./build/programs/clickhouse tests/queries/0_stateless/04241_executable_udf_driver.sh

Tests: CLICKHOUSE_BINARY=./build/programs/clickhouse tests/queries/0_stateless/04242_executable_udf_driver_errors.sh

Tests: `DockerC` `numbers_mt(5000000)` with `max_threads = 64`

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..

c_driver_common.py

Run DockerC workers in separate containers

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docker_c_create.sh

Split DockerC C-body driver runtimes

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docker_c_drop.sh

Split DockerC C-body driver runtimes

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gvisor_c_create.sh

Split DockerC C-body driver runtimes

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gvisor_c_drop.sh

Split DockerC C-body driver runtimes

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unsafe_c_create.sh

Split DockerC C-body driver runtimes

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unsafe_c_drop.sh

Split DockerC C-body driver runtimes

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