refactor(persist_test_utils)!: Rewrite persist_test_utils

- deps: Make tempfile, anyhow dev-dependencies

Author: ValuedMammal

Cargo.toml

@@ -38,7 +38,7 @@ all-keys = ["keys-bip39"]
 keys-bip39 = ["bip39"]
 rusqlite = ["bdk_chain/rusqlite"]
 file_store = ["bdk_file_store"]
-test-utils = ["std", "anyhow", "tempfile"]
+test-utils = ["std"]
 
 [dev-dependencies]
 anyhow = "1"