test: Add test for descriptor types.

[ItoroD]

Description

This test was taken from our old Offline test that @thunderbiscuit created here. I only updated with a few additions like Check for sortedmulti. I was taking a look at issue #687 and figured these are good tests to bring back. These tests have shown some more descriptor types we can do in the bindings. I am particular curious about tr and the range of complex descriptors we are able to perform currently and those we cannot. Adding these test is a great way to start.

Notes to the reviewers

Documentation

• bdk_wallet
• bitcoin
• uniffi
• Other:

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing
• I've added a changelog in the next release tracking issue (see example)
• I've linked the relevant upstream docs or specs above