Enumerated property completeness tests

[kartva]

fixes #4283

Description of changes:

• Introduced create_const_array macro that produces an array of tuples of the values and names of the constants defined in an impl block.
• Use this constant to iterate over underlying data and report differences.

Example output on modifying Wide = EastAsianWidth(2); //name="W" to EastAsianWidth(52):

Values defined in data do not match values defined in consts. Difference (value, data name, const name):
 [(5, Some("W"), None), (52, None, Some("Wide"))]

[CLAassistant]

All committers have signed the CLA.

[sffc]

Nice work!

[kartva]

Example failing test output:

Values defined in data do not match values defined in consts. Difference:
[
    Data:       "Narrow":       4,
    Data:       "Wide": 5,
    Consts:     "Wide": 52,
]

[sffc]

Nice work!