spm: local build beta.2

[reez]

Description

bdk-ffi
Use local bindings of bitcoindevkit/bdk-ffi#582

bdk releases
https://github.com/bitcoindevkit/bdk/releases/tag/v1.0.0-beta.1
https://github.com/bitcoindevkit/bdk/releases/tag/v1.0.0-beta.2

Notes to the reviewers

I did have to delete keychain since I was getting LoadWithPersistError.CouldNotLoad

Changelog notice

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I have formatted my code with swift-format per .swift-format file

New Features:

• I've added tests for the new feature
• I've added docs for the new feature

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