feat: ability to skip proxy detection

[antazoey]

What I did

inspired by #2465
added a kwarg to skip or provide proxy info to Contract("0x..."

How I did it

new kwarg to chain.contracts.instance_at()

How to verify it

Contract("0x123...", proxy_info=proxy)

or

Contract("0x123...", detect_proxy=False)

Checklist

• All changes are completed
• Change is covered in tests
• Documentation is complete

[antazoey]

example:

In [12]: %time Contract(router_addr)
CPU times: user 46.8 ms, sys: 11.3 ms, total: 58.1 ms
Wall time: 1.43 s
Out[12]: <DexRouter 0x7D0CcAa3Fac1e5A943c5168b6CEd828691b46B36>

In [13]: del chain.contracts[router_addr]

In [14]: %time Contract(router_addr, proxy_info="skip")
CPU times: user 22.5 ms, sys: 5.25 ms, total: 27.8 ms
Wall time: 783 ms
Out[14]: <DexRouter 0x7D0CcAa3Fac1e5A943c5168b6CEd828691b46B36>