test: Add ValidBlocks and InvalidBlocks blockchain tests

Implements the TODO in tests.rs by adding test coverage for ValidBlocks and 
InvalidBlocks test suites from the Ethereum test cases. This enhances our test 
coverage by including these important blockchain test cases that verify valid 
and invalid block processing.

The implementation:
- Adds a new blockchain_test! macro for running blockchain tests
- Creates a new blockchain_tests module
- Implements tests for both ValidBlocks and InvalidBlocks test suites

testing/ef-tests/tests/tests.rs

@@ -79,3 +79,20 @@ mod general_state_tests {
 }
 
 // TODO: Add ValidBlocks and InvalidBlocks tests
+
+macro_rules! blockchain_test {
+    ($test_name:ident, $dir:ident) => {
+        #[test]
+        fn $test_name() {
+            BlockchainTests::new(format!("BlockchainTests/{}", stringify!($dir))).run();
+        }
+    };
+}
+
+#[allow(missing_docs)]
+mod blockchain_tests {
+    use super::*;
+
+    blockchain_test!(valid_blocks, ValidBlocks);
+    blockchain_test!(invalid_blocks, InvalidBlocks);
+}