Add two bytes and three bytes utf8 character tests for allocString

[JesseCodeBones]

Currently the repo missed the tests for 2 bytes utf-8 character, 3 bytes utf-8 character and 4 bytes utf-8 character (4 bytes utf-8 character cannot bypass the parser phase, not sure if it is by design, for example charactor: 𝆑).

This PR attampts to add tests for global parameter name with utf-8 character, 3 bytes utf-8 character, AS will call allocString and alloc this utf-8 string to binary.

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