Merge bitcoindevkit/bdk#1476: fix(wallet)!: Simplify `SignOptions` and improve finali...

996605f2bf9440dd42647123a127c038253f0247 fix(wallet)!: Simplify `SignOptions` and improve finalization logic (valued mammal)

Pull request description:

  Rather than comingle various `SignOptions` with the finalization step, we simply clear all fields when finalizing as per the PSBT spec in BIPs 174 and 371 which is more in line with user expectations.

  ### Notes to the reviewers

  I chose to re-implement some parts of [`finalize_input`](https://docs.rs/miniscript/latest/src/miniscript/psbt/finalizer.rs.html#434) since it's fairly straightforward, see also https://github.com/bitcoindevkit/bdk/issues/1461#issuecomment-2171983426. I had to refactor some wallet tests but didn't go out of my way to add additional tests.

  closes #1461

  ### Changelog notice

  - Removed field `remove_partial_sigs` from `SignOptions`
  - Removed field `remove_taproot_extras` from `SignOptions`

  ### Checklists

  #### All Submissions:

  * [x] I've signed all my commits
  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

  #### Bugfixes:

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

ACKs for top commit:
  evanlinjin:
    re-ACK 996605f2bf9440dd42647123a127c038253f0247

Tree-SHA512: 63e78e75c22031424e87fcc26cd6b0015c626cd57c02680256bad9d1783cef71f4048b2d7ce5d0425cd4239351e37dd0e2a626dda7e8417af7fc52cb0afe6933