fix(nayduck) - The nayduck infra looks for the test contracts in the wrong place.

[wacban]

Description

The nayduck infra tries to load the contracts from the source code directory:

nearcore/pytest/lib/utils.py

Lines 244 to 254 in 8806e63

	def load_test_contract(
	filename: str = 'backwards_compatible_rs_contract.wasm') -> bytearray:
	"""Loads a WASM file from near-test-contracts package.
	This is just a convenience function around load_binary_file which loads
	files from ../runtime/near-test-contracts/res directory. By default
	test_contract_rs.wasm is loaded.
	"""
	repo_dir = pathlib.Path(__file__).resolve().parents[2]
	path = repo_dir / 'runtime/near-test-contracts/res' / filename
	return load_binary_file(path)

The actual contracts however are stored in the out dir:

nearcore/runtime/near-test-contracts/build.rs

Lines 74 to 75 in 668b0d6

	fn build_contract(dir: &str, args: &[&str], output: &str) -> Result<(), Error> {
	let target_dir = out_dir();

This results in the contracts used by nayduck never being updated. If the old contract somehow gets lost, some tests will immediately start failing.

Please fix it so that the nayduck python tests always use the correct contracts.

More context:
https://near.zulipchat.com/#narrow/channel/295302-general/topic/nayduck/near/494153129

Potential fix - needs testing and finishing:
#12748