Merge bitcoindevkit/bdk#502: Refactor verification logic

1999d97aeb3d97ee24a9b59a2f1453a26943b595 Remove `verify` flag from `TransactionDetails` via new MIGRATIONS (Steve Myers)
0195bc0636d9a58013f0cbc3781d213b0cfc1509 Update CHANGELOG (rajarshimaitra)
1d7ea89d8a792013212b1d269895b02fe3b410bd Refactor sync time verification (rajarshimaitra)
b05ee78c7335f7e3a1593dc4ff7686e6f72ff5c0 Remove verifcation flag from compact_filters (rajarshimaitra)
53c30b0479c74dde17cd27f8eac7f540e492067d Add verification tests in CI (rajarshimaitra)
6a09075d1a87509e9117eab727132efdf8ea6e1d Remove verify flag from sqlite DB (rajarshimaitra)
61a95d0d15b9944e8b5d13db64ef6ffd9a8d6e29 Update changelog (rajarshimaitra)
08f312a82f889f6bf5dfedfaa565ac2cb59683ae Remove `verify` flag from `TransactionDetails` (rajarshimaitra)
acbf0ae08e0732579652aece9bc48169351884cf Add sync verification for `esplora` (rajarshimaitra)
4761155707a819c4db437e71a36621a027d5302a Add sync verification in `electrum` (rajarshimaitra)
98a3b3282a0ff59bbdf900adc765f6912d1975c1 Remove sync verification (rajarshimaitra)

Pull request description:

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  ### Description

  As discussed in https://github.com/bitcoindevkit/bdk/issues/498 and also in team call,
   - default verification from wallet sync is removed
   - `verify_tx` refactored as an wallet API
   - in `sync` verification added for electrum and esplora backends, gated by `verify` flag.
   - `verify` flag is removed from `TransactionDetails`.

  ### Notes to the reviewers

  I haven't looked into `comapct_filters` to see how verification can fit there, but that will probably be required in future.

  ### 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

  #### Wallet API change:

  * [x] I've updated `CHANGELOG.md`

Top commit has no ACKs.

Tree-SHA512: 72e307008a137468d96d5c2a6ec804b18fa52363606f3c978208ae5dc22973a7f0aa37488e9bb98dde88409a12d59cc5f00c675d2d408e57e661bf6210bee67b