Preview macros cleanup

[kboyarinov]

Description

Remove usages of outdated preview macros TBB_PREVIEW_WAITING_FOR_WORKERS, TBB_PREVIEW_ALGORITHM_TRACE and TBB_PREVIEW_VARIADIC_PARALLEL_INVOKE.
Rename __TBB_PREVIEW_CRITICAL_TASKS to __TBB_CRITICAL_TASKS since it does not represents a preview feature anymore but can be used for internal debugging.

Fixes # - issue number(s) if exists

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• bug fix - change that fixes an issue
• new feature - change that adds functionality
• tests - change in tests
• infrastructure - change in infrastructure and CI
• documentation - documentation update

Tests

• added - required for new features and some bug fixes
• not needed

Documentation

• updated in # - add PR number
• needs to be updated
• not needed

Breaks backward compatibility

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• No
• Unknown

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Other information

[isaevil]

LGTM