[confidentialledger] mypy: function has duplicate type signatures

[kristapratico]

There are duplicate type signatures present in this init which prevents mypy from continuing to run checks:

azure-sdk-for-python/sdk/confidentialledger/azure-confidentialledger/azure/confidentialledger/_models.py

Lines 291 to 296 in c247151

	def __init__(
	self,
	transaction_id, # type: str
	receipt, # type: List[int]
	):
	# type: (int, List[int]) -> None

This prevents customers from getting typing information from the package.

This is reproducible by running mypy==0.931 at the package level directory:

azure-sdk-for-python\sdk\confidentialledger\azure-confidentialledger>python -m mypy ./azure
azure\confidentialledger\_models.py:291: error: Function has duplicate type signatures
Found 1 error in 1 file (errors prevented further checking)

[lynshi]

I've created this PR to resolve the issue. Please let me know if there's any further changes required!