Upgrade to rust-bitcoin 0.29

[afilini]

Description

Upgrade BDK to rust-bitcoin 0.29

Missing pieces:

• [x] rust-miniscript update_output_with_descriptor - rust-bitcoin/rust-miniscript#465
• [ ] rust-miniscript 8.0.0 release - rust-bitcoin/rust-miniscript#462
• [ ] Upgrade rust-hwi to bitcoin 0.29
• [ ] Upgrade esplora-client to bitcoin 0.29
• [ ] Upgrade rand to 0.8 like secp256k1 did

Notes to the reviewers

The commits still need to be reordered and cleaned up

Changelog notice

• Upgrade rust-bitcoin to 0.29
• Remove deprecated "address validators"

Checklists

All Submissions:

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

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