chore: update rust bdk_wallet to alpha 12

This commit also introduces the sqlite store and removes the flat file
 store

bdk-jvm/lib/src/test/kotlin/org/bitcoindevkit/LiveTxBuilderTest.kt

@@ -11,7 +11,7 @@ private const val TESTNET_ESPLORA_URL = "https://esplora.testnet.kuutamo.cloud"
 class LiveTxBuilderTest {
     private val persistenceFilePath = run {
         val currentDirectory = System.getProperty("user.dir")
-        "$currentDirectory/bdk_persistence.db"
+        "$currentDirectory/bdk_persistence.sqlite"
     }
 
     @AfterTest

bdk-jvm/lib/src/test/kotlin/org/bitcoindevkit/LiveWalletTest.kt

@@ -11,7 +11,7 @@ private const val TESTNET_ESPLORA_URL = "https://esplora.testnet.kuutamo.cloud"
 class LiveWalletTest {
     private val persistenceFilePath = run {
         val currentDirectory = System.getProperty("user.dir")
-        "$currentDirectory/bdk_persistence.db"
+        "$currentDirectory/bdk_persistence.sqlite"
     }
 
     @AfterTest

bdk-jvm/lib/src/test/kotlin/org/bitcoindevkit/OfflineWalletTest.kt

@@ -10,7 +10,7 @@ import kotlin.test.assertFalse
 class OfflineWalletTest {
     private val persistenceFilePath = run {
         val currentDirectory = System.getProperty("user.dir")
-        "$currentDirectory/bdk_persistence.db"
+        "$currentDirectory/bdk_persistence.sqlite"
     }
 
     @AfterTest