Deprecate utils function `defer` in favour of `Promise.withResolvers` (#4829)

* Switch from defer to Promise.withResolvers

As supported by the outgoing LTS version (v22) which has 99% support of ES2024

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* delint

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Deprecate defer instead of killing it

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Knip

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate based on review

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate based on review

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate based on review

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Improve coverage

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

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Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>