fix: correct typos and improve comments across multiple files by codespell (#4116)

Signed-off-by: Huang Qi <huangqi3@xiaomi.com>

tests/unit/linear-memory-wasm/linear_memory_wasm_test.cc

@@ -41,7 +41,7 @@ class TEST_SUITE_NAME : public testing::Test
     // accessed from sub-classes.
 
     // virtual void SetUp() will be called before each test is run.  You
-    // should define it if you need to initialize the varaibles.
+    // should define it if you need to initialize the variables.
     // Otherwise, this can be skipped.
     virtual void SetUp() {}