CU-86dtb6tu5 - Change the usage of typing.Union and typing.Optional to use the native | operator and update tests accordingly

[luc10921]

Summary or solution description
It's now possible to use | instead of Union or Optional from typing

How to Reproduce

neo3-boa/boa3_test/test_sc/if_test/IfIsNotNone.py

Lines 4 to 9 in ae2d62c

	@public
	def main(a: int | None) -> bool:
	if a is not None:
	return some_function(a)
	else:
	return False

Platform:

• OS: Windows 11 x64
• Python version: Python 3.11

[melanke]

Task linked: CU-86dtb6tu5 Change the usage of typing.Union and typing.Optional to use the native | operator and update tests accordingly

[coveralls]

coverage: 91.779% (+0.006%) from 91.773%
when pulling 2909845 on CU-86dtb6tu5
into 44bc501 on development.