Populate the redeemScript for sh(wsh(sortedmulti()))

[afilini]

Description

Also explicitly match all the individual variants to ensure a similar problem
doesn't happen again.

Fixes #609

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing

Bugfixes:

• This pull request breaks the existing API
• I've added tests to reproduce the issue which are now passing
• I'm linking the issue being fixed by this PR

[notmandatory]

It looks like this fix includes the TR type so it must be dependent on rust-bitcoin 0.28 and rust-miniscript 7.0, so that means we if we wanted to release it in a fix release we'd need some small change to work with the older versions of those dependencies right? Since @ulrichard isn't held up waiting for this I'm now leaning towards releasing it with the next regular release instead of a 0.18.1 fix release.

[notmandatory]

ACK 82de8b5

[afilini]

Yeah that's true, he said it's not blocking on discord so I would just go ahead and merge this.

Thanks for the review!