Merge bitcoindevkit/bdk#605: Fix sqlite database set_utxo to insert or update utxos

35feb107ed5969720ce54a6aa76b7b2176f6c7c1 [CI] Fix cont_integration test-blockchains to run all tests (Steve Myers)
24719081511969299459d01566b0d669a7b51f7b Update CHANGELOG with warning about sqlite-db deleted wallet data (Steve Myers)
0b1a399f4e556a981bb992cc9b1d34318e260a7c Update sqlite schema with unique index for utxos, change insert_utxo to upsert (Steve Myers)
cea79872d717b395560a344cc4dd0e022c3bd9a9 Update database tests to verify set_utxo upserts (Steve Myers)

Pull request description:

  ### Description

  This PR fixes #591 by:
  1. Add sqlite `MIGRATIONS` statements to remove duplicate utxos and add unique utxos index on txid and vout.
  2. Do an upsert (if insert fails update) instead of an insert in `set_utxo()`.
  3. Update database::test::test_utxo to also verify `set_utxo()` doesn't insert duplicate utxos.

  ### Notes to the reviewers

  I verified the updated `test_utxo` fails as expected before my fix and passes after the fix. I tested the new migrations using the below `bdk-cli` command and a manually updated sqlite db with duplicate utxos.
  ```shell
  cargo run --no-default-features --features cli,sqlite-db,esplora-ureq -- wallet -w test1 --descriptor "wpkh(tpubEBr4i6yk5nf5DAaJpsi9N2pPYBeJ7fZ5Z9rmN4977iYLCGco1VyjB9tvvuvYtfZzjD5A8igzgw3HeWeeKFmanHYqksqZXYXGsw5zjnj7KM9/*)" sync
  ```

  ### 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

  #### New Features:

  * [ ] I've added tests for the new feature
  * [ ] I've added docs for the new feature
  * [ ] I've updated `CHANGELOG.md`

  #### Bugfixes:

  * [ ] This pull request breaks the existing API
  * [x] 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:
  danielabrozzoni:
    utACK 35feb107ed5969720ce54a6aa76b7b2176f6c7c1 - Code looks good, but I didn't do any local test to see if the db gets wiped

Tree-SHA512: 753c7a0cfd0e803b5e12f39181d9a718791c4ce229d5072e6498db75a7008e94d447b3d0b4b0c205e7a8f127f60102e12bac2d271b8bad3a3038856bfd54e99c