Use parameter_types instead of thread_local for test-setup

[kianenigma]

parameter_types! {
    pub static Members: BoundedVec<u64,ConstU32<10_u32>> = bounded_vec![0,10]
}

and then you get Members::get() and Members::set() with the same functionality.

Originally posted by @kianenigma in #11996 (comment)

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As per explained in the above PR.

[ggwpez]

That should also fix this #10479, if used everywhere.

[bkchr]

You can not use parameter_types! in all tests. The problem is that some tests require that you change the values between different tests.

[kianenigma]

I don't see any function difference between the two. It is merely for the nicer syntax. Can you provide an example?

[bkchr]

Okay, I mixed stuff up. There is some usage of thread_local in the frame tests, but none of them is used directly as alternative for parameter_types. More like some way to introspect operations.

[tifecool]

Would like to attempt this.