fix: removes code lens for commented main functions

[soorya-u]

What it does?

• Code Lens is not not visible on top of main function which is commented out

[Vexu]

This causes the code lens to appear after the last comment instead of before the main function:

There is also a similar regex in zigTestRunnerProvider.ts with the same problem if you'd like to fix that as well.

[soorya-u]

I'm new to zig, so does zig support

test foo { }
// or
test @"foo" { }

The Test Explorer regex recognizes this syntax as a valid test, but the ZLS throws an error.