Adding more tests for array copying from storage to storage.

test/libsolidity/syntaxTests/array/invalidCopy/storage_to_storage_different_base.sol

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+contract C {
+    byte[32] data1;
+    bytes2[10] data2;
+    function f() external {
+        data1 = data2;
+    }
+}
+// ----
+// TypeError 7407: (99-104): Type bytes2[10] storage ref is not implicitly convertible to expected type bytes1[32] storage ref.

test/libsolidity/syntaxTests/array/invalidCopy/storage_to_storage_different_base_2.sol

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+contract C {
+    uint64[32] data1;
+    uint256[10] data2;
+    function f() external {
+        data1 = data2;
+    }
+}
+// ----
+// TypeError 7407: (102-107): Type uint256[10] storage ref is not implicitly convertible to expected type uint64[32] storage ref.

test/libsolidity/syntaxTests/array/invalidCopy/storage_to_storage_dynamic_to_static.sol

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+contract C {
+    uint256[10] data1;
+    uint256[] data2;
+    function f() external {
+        data1 = data2;
+    }
+}
+// ----
+// TypeError 7407: (101-106): Type uint256[] storage ref is not implicitly convertible to expected type uint256[10] storage ref.

test/libsolidity/syntaxTests/array/invalidCopy/storage_to_storage_static_longer_to_shorter.sol

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+contract C {
+    uint256[10] data1;
+    uint256[18] data2;
+    function f() external {
+        data1 = data2;
+    }
+}
+// ----
+// TypeError 7407: (103-108): Type uint256[18] storage ref is not implicitly convertible to expected type uint256[10] storage ref.