fmt: remove the prefixed module name of the const name in same module. (related #22183)

[yuyi98]

This PR remove the prefixed module name of the const name in same module.(related #22183)

• Remove the prefixed module name of the const name in same module.
• Modify all the related files and tests.

module tt1

const full_name = 'Robert the Tomato'

fn print_full_name() {
	println(full_name)
	println(full_name)
}

fn print_name() {
	println(name)
	println(name)
}

module tt1

const name = 'Bob'

[spytheman]

Excellent work 🥳 !
Less arbitrary rules and exceptions in v.fmt, producing shorter and cleaner code ❤️ .