Revert "Add validation phone field on checkout page"

[engcom-Charlie]

Reverts #27537

This PR has been reverted due to a regression bug for 2.4.1 MC-36812. These changes was Rejected by Product Manager

Explanation:

The input validation on the customer and customer address attributes should be configured in Admin in attribute settings. There is currently possible to configure only numbers and - symbol input validation and all the validations are extensible so if merchants want to add any other validation rules which are not available out of the box they can customize them by themselves.

This functionality is already available in Admin Panel(UI) for Commerce edition(EE). It has section "Customer Address Attributes"

In Open Sorce(CE) edition, there is no UI in Admin Panel for this but it can be easily done with minimal dev assistance.

[m2-assistant]

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[engcom-Charlie]

@magento run all tests

[engcom-Charlie]

@sidolov Please review this PR.

[magento-engcom-team]

Hi @sidolov, thank you for the review.
ENGCOM-8032 has been created to process this Pull Request
✳️ @sidolov, could you please add one of the following labels to the Pull Request?

Label	Description
Auto-Tests: Covered	All changes in Pull Request is covered by auto-tests
Auto-Tests: Not Covered	Changes in Pull Request requires coverage by auto-tests
Auto-Tests: Not Required	Changes in Pull Request does not require coverage by auto-tests

[engcom-Alfa]

✔️ QA Passed

Precondition:
Magento 2.4-develop (EE)
Create a category;
Create Product and assign to category;

Manual testing scenario:

1. Go to Admin -> Stores -> Attributes -> Customer Address and select telephone attribute for edit;
2. Make sure that Input Validation is set to None

3. Go to Storefront;
4. Add product to cart;
5. Click on Proceed to Checkout button;
6. Fill all required fields;

Before: ✖️ Please enter a valid phone number. For example (123) 456-7890 or 123-456-7890.

After: ✔️ No validation for Phone Number field

Also was checked on the CE and B2B versions of Magento, and everything works as previous (expected).

[ihor-sviziev]

@engcom-Charlie @sidolov thank you for making revert publicly with sharing reason why it was reverted!

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