feat: async sleep

Depends on !353 (merged)

Moves async sleep function, which was introduced in picodata!601 (merged) in util, to tarantool module.

requested review from @gmoshkin

assigned to @e-ivkov

added 1 commit

• 88f31cf0 - feat: async sleep

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added 4 commits

• d60fc81d - 1 commit from branch master
• 68c44282 - feat: Custom time::Instant on top of fiber_clock
• 84e1b26c - feat: use custom Instant
• 132f17fd - feat: async sleep

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added 3 commits

• 132f17fd...e56bd683 - 2 commits from branch master
• c79acb97 - feat: async sleep

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approved this merge request

added 1 commit

• e71cb0ff - chore: fix docstrings markup

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merged

mentioned in merge request picodata!620 (merged)