test: unignore working tests (#4020)

Description
---
- unignores `store_and_retrieve_blocks_from_contents` and  `test_transaction_cancellation`
- fixes flaky `store_and_retrieve_blocks_from_contents` test 

Motivation and Context
---
These tests work

How Has This Been Tested?
---
Tests pass

base_layer/core/tests/chain_storage_tests/chain_storage.rs

@@ -1161,7 +1161,6 @@ fn asset_unique_id() {
 }
 
 #[test]
-#[ignore = "To be completed with pruned mode"]
 #[allow(clippy::identity_op)]
 fn store_and_retrieve_blocks_from_contents() {
     let network = Network::LocalNet;
@@ -1180,7 +1179,7 @@ fn store_and_retrieve_blocks_from_contents() {
             generate_new_block(&mut db, &mut blocks, &mut outputs, schema, &consensus_manager).unwrap()
     );
     let kernel_sig = blocks[1].block().body.kernels()[0].clone().excess_sig;
-    let utxo_commit = blocks[1].block().body.outputs()[0].clone().commitment;
+    let utxo_commit = blocks.last().unwrap().block().body.outputs()[0].clone().commitment;
     assert_eq!(
         db.fetch_block_with_kernel(kernel_sig)
             .unwrap()
@@ -1196,7 +1195,7 @@ fn store_and_retrieve_blocks_from_contents() {
             .unwrap()
             .try_into_chain_block()
             .unwrap(),
-        blocks[1]
+        blocks[2]
     );
 }
 

base_layer/wallet/tests/transaction_service_tests/service.rs

@@ -2110,7 +2110,6 @@ fn test_set_num_confirmations() {
 }
 
 #[test]
-#[ignore = "test is flaky"]
 fn test_transaction_cancellation() {
     let factories = CryptoFactories::default();
     let mut runtime = Runtime::new().unwrap();
@@ -2253,7 +2252,7 @@ fn test_transaction_cancellation() {
     let amount = MicroTari::from(10_000);
     builder
         .with_lock_height(0)
-        .with_fee_per_gram(MicroTari::from(177))
+        .with_fee_per_gram(MicroTari::from(5))
         .with_offset(PrivateKey::random(&mut OsRng))
         .with_private_nonce(PrivateKey::random(&mut OsRng))
         .with_amount(0, amount)
@@ -2340,7 +2339,7 @@ fn test_transaction_cancellation() {
     let amount = MicroTari::from(10_000);
     builder
         .with_lock_height(0)
-        .with_fee_per_gram(MicroTari::from(177))
+        .with_fee_per_gram(MicroTari::from(5))
         .with_offset(PrivateKey::random(&mut OsRng))
         .with_private_nonce(PrivateKey::random(&mut OsRng))
         .with_amount(0, amount)