Start migrating imported functions to the new definition style

[kateinoigakukun]

Use of different function names for C-name and Wasm's import name is a bit confusing. Also use of unprefixed function names in the C code is not a good practice. This commit starts migrating imported functions to the new naming convention and removes duplicated function definitions just for IDE support by using macro.

[github-actions]

Time Change: -394ms (4%)

Total Time: 9,416ms

Test name	Duration	Change
Serialization/JavaScript function call through Wasm import	20ms	-1ms (5%)	✅
Serialization/Swift String to JavaScript with assignment	387ms	-33ms (8%)	✅
Serialization/Swift String to JavaScript with call	985ms	-50ms (5%)	✅
Serialization/JavaScript String to Swift String	3,698ms	-259ms (7%)	✅

View Unchanged

Test name	Duration	Change
Serialization/JavaScript function call through Wasm import with int	15ms	+1ms
Serialization/JavaScript function call from Swift	104ms	+0ms
Serialization/Swift Int to JavaScript with assignment	320ms	-14ms (4%)
Serialization/Swift Int to JavaScript with call	946ms	-36ms (3%)
Serialization/JavaScript Number to Swift Int	300ms	-11ms (3%)
Object heap/Increment and decrement RC	2,629ms	+15ms (0%)

View Baselines

Test name	Duration
Serialization/Call JavaScript function directly	4ms
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