optimization: enable QIO mode for flash for faster reading from flash

[finger563]

Description

Set QIO mode for flash in sdkconfig.defaults, which reads from the flash almost twice as fast as the default DIO mode.

Motivation and Context

The faster we read from flash, the faster we load / run code from it. The majority of code we run is coming from flash, so this simple optimization speeds us up a little bit :)

How has this been tested?

Building and running main on box-emu and box-3-emu.

Screenshots (if appropriate, e.g. schematic, board, console logs, lab pictures):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Hardware (schematic, board, system design) change
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• I have updated the .github/workflows/build.yml file to add my new test to the automated cloud build github action.
• All new and existing tests passed.
• My code follows the code style of this project.

[github-actions]

✅Static analysis result - no issues found! ✅