Enhancement: improve data validation for the give_clean() function

[glaubersilva]

Resolves GIVE-2063

Description

This PR changes the give_clean() function to prevent unserializing data by default, now we are unserializing only when the $allow_serialized_data is true, otherwise, we are returning an empty string when data is serialized.

This PR also improves the regex used in the containsSerializedDataRegex() to cover all data types instead of only arrays and objects.

Affects

As many places are using the give_clean() function, these changes affect the entire codebase, especially the submission of new donations.

Visuals

V2 form error message:

V3 form error message:

Testing Instructions

1. Create a V2 and a V3 Donation Form;
2. Create a test donation using the V2 form and in the donor's first name add the following serialized data: a:1:{s:4:"Test";s:15:"serialize here!";}
3. Make sure the donation wasn't finished and you got the Error: Please enter your first name. message.
4. Now create a test donation using the V3 form and in the donor's first name add the following serialized data: a:1:{s:4:"Test";s:15:"serialize here!";}
5. And make sure the donation wasn't finished and you got the First name is required message.

Pre-review Checklist

• Acceptance criteria satisfied and marked in related issue
• Relevant @unreleased tags included in DocBlocks
• Includes unit tests
• Reviewed by the designer (if follows a design)
• Self Review of code and UX completed