layout_builder__translation column hitting database limit

Problem/Motivation

This depends upon 🐛 layout_builder__layout_section column hitting database limit Needs work and ✨ Additional blob field sizes in schema definitions Needs work both landing first.

The size limit for a site with multiple blocks and lots of fields on those blocks can grow quite large. Let's increase the db table's column size.

Steps to reproduce

See 🐛 layout_builder__layout_section column hitting database limit Needs work

Proposed resolution

Increase table column size. See MR.

Remaining tasks

User interface changes

API changes

Data model changes