Add sharedMemory option to allow threads with shared memory

[kateinoigakukun]

No description provided.

[github-actions]

Time Change: +230ms (2%)

Total Time: 9,278ms

Test name	Duration	Change
Serialization/JavaScript function call through Wasm import	18ms	-1ms (6%)	✅

View Unchanged

Test name	Duration	Change
Serialization/JavaScript function call through Wasm import with int	14ms	-0ms
Serialization/JavaScript function call from Swift	92ms	-3ms (3%)
Serialization/Swift Int to JavaScript with assignment	320ms	-4ms (1%)
Serialization/Swift Int to JavaScript with call	926ms	+13ms (1%)
Serialization/JavaScript Number to Swift Int	299ms	-1ms (0%)
Serialization/Swift String to JavaScript with assignment	375ms	+1ms
Serialization/Swift String to JavaScript with call	980ms	+17ms (1%)
Serialization/JavaScript String to Swift String	3,614ms	+142ms (3%)
Object heap/Increment and decrement RC	2,628ms	+67ms (2%)

View Baselines

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