token-2022: Nits of token-2022 extensions

[febo]

Problem

Some of the extensions are not following the same pattern.

Solution

Update the extensions to make them consistent.

[LStan]

Why did you change impl SomeStruct<'_, '_, '_> to impl<'a, 'b, 'c> SomeStruct<'a, 'b, 'c>, but didn't change impl SomeStruct<'_, '_> to impl<'a, 'b, 'c> SomeStruct<'a, 'b>?

[febo]

Why did you change impl SomeStruct<'_, '_, '_> to impl<'a, 'b, 'c> SomeStruct<'a, 'b, 'c>, but didn't change impl SomeStruct<'_, '_> to impl<'a, 'b, 'c> SomeStruct<'a, 'b>?

It all depends whether there is a constructor helper (new and with_multisig_signers) or not. They use the lifetimes, so we need to have them explicit in that case.

[joncinque]

Looks great!