`ez_maker`: adjust layout names

[fauxpark]

Description

⚠ ez_maker/directpins/promicro: "LAYOUT_all" should be "LAYOUT" unless additional layouts are provided.
⚠ ez_maker/directpins/proton_c: "LAYOUT_all" should be "LAYOUT" unless additional layouts are provided.
⚠ ez_maker/directpins/rp2040: "LAYOUT_all" should be "LAYOUT" unless additional layouts are provided.
⚠ ez_maker/directpins/teensy_2: "LAYOUT_all" should be "LAYOUT" unless additional layouts are provided.
⚠ ez_maker/directpins/teensy_2pp: "LAYOUT_all" should be "LAYOUT" unless additional layouts are provided.
⚠ ez_maker/directpins/teensy_32: "LAYOUT_all" should be "LAYOUT" unless additional layouts are provided.
⚠ ez_maker/directpins/teensy_lc: "LAYOUT_all" should be "LAYOUT" unless additional layouts are provided.

Types of Changes

• [ ] Core
• [ ] Bugfix
• [ ] New feature
• [x] Enhancement/optimization
• [x] Keyboard (addition or update)
• [x] Keymap/layout/userspace (addition or update)
• [ ] Documentation

Issues Fixed or Closed by This PR

Checklist

• [x] My code follows the code style of this project: C, Python
• [x] I have read the PR Checklist document and have made the appropriate changes.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] I have tested the changes and verified that they work and don't break anything (as well as I can manage).