Add trim filter to first, middle and lastname.

[wardcapp]

Description

The additional trim form field data filter was created and added as
input filter to the firstname, lastname and middlename fields
of the customer_address and customer entities.

Fixed Issues (if relevant)

1. Customer First and Last names not being trimmed of leading and trailing spaces on save. #10415: Customer First and Last names not being trimmed of leading and trailing spaces on save.

Manual testing scenarios

1. Create a new customer from the Customers > All Customers > Create New Customer window
2. Create First name: "John " Last name: " Doe ", add a fake email address.
3. Click save
4. Search and edit the contact "John Doe "
5. Take note that the spaces are no longer in the users first, middle and last names. Same goes for the customer names set on the customer addresses.

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-cicd2]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 3 committers have signed the CLA.

✅ wardcapp
❌ paliarush
❌ viktym

[wardcapp]

Deleted the earlier set up branch by accident, my bad. The pull request was re-created, making sure the fix can still be merged (see #12964).