[Spike] Replace intl-tel-input input with Calypso phone input component

[mordeth]

Description

This spike evaluates the benefit of replacing the intl-tel-input phone input library with the Calypso phone input component in favor of bundle size.

[vbelolapotkov]

@anu-rock @timmy5685 routing this one to you since telephone input is used in account settings.

[anu-rock]

I think this issue can be closed as it was fixed by #7611 which uses a new telephone input component added in WooCommerce via woocommerce/woocommerce#40335. Pinging the issue author @mordeth to verify and close as needed.

[mordeth]

Indeed, this spike can be closed as it is no longer relevant. Nevertheless, I've identified two instances in the code where 'intl-tel-input' is still being utilized, and we may consider replacing it with woocommerce/woocommerce#40335.

[mordeth]

A new issue, #8581, has been opened to remove all occurrences of intl-tel-input.