Add a benchmark for property access using dynamic member lookup

[kateinoigakukun]

To see how much https://github.com/swiftwasm/JavaScriptKit/pull/253 will improve performance

[github-actions[bot]]

Time Change: +2,541ms (21%) 🚨

Total Time: 11,680ms

Test name	Duration	Change
Serialization/JavaScript function call through Wasm import	21ms	+2ms (7%)	🔍
Serialization/JavaScript function call from Swift	99ms	+5ms (5%)	🔍
Serialization/Swift Int to JavaScript with assignment	339ms	+24ms (7%)	🔍
Serialization/Swift Int to JavaScript with call	967ms	+50ms (5%)	🔍
Serialization/JavaScript Number to Swift Int	313ms	+18ms (5%)	🔍
Serialization/Swift String to JavaScript with call	1,046ms	+64ms (6%)	🔍
Serialization/JavaScript String to Swift String	3,790ms	+268ms (7%)	🔍
Property access/Dynamic member lookup	2,014ms	+2,014ms (100%)	🆘

View Unchanged

| Test name | Duration | Change | | :--- | :---: | :---: | | Serialization/JavaScript function call through Wasm import with int | 14ms | -0ms | | Serialization/Swift String to JavaScript with assignment | 395ms | +15ms (3%) | | Object heap/Increment and decrement RC | 2,668ms | +80ms (3%) |

View Baselines

| Test name | Duration | | :--- | :---: | | Serialization/Call JavaScript function directly | 3ms | | Serialization/Assign JavaScript number directly | 3ms | | Serialization/Call with JavaScript number directly | 3ms | | Serialization/Write JavaScript string directly | 2ms | | Serialization/Call with JavaScript string directly | 3ms |