Updated default value to match sync cluster API

[vladvildanov]

Pull Request check-list

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• Do tests and lints pass with this change?
• Do the CI tests pass with this change (enable it first in your forked repo and wait for the github action build to finish)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?
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Description of change

The goal of this PR if to fix misalignment between the default value of require_full_coverage configuration option for sync/async clients. The default value was chosen to be True by default for safety reasons.

[akx]

What does this PR mean to do? It's not clear from the title, description, or commit message?

[vladvildanov]

@akx Sorry for this, the PR description was updated

[akx]

@vladvildanov Should the word "much" in the title be "match"? 😅

[vladvildanov]

@akx Oh, thank you! 😳