Adjust farmer service SSL tests for increased reliability

[emlowe]

Currently, the SSL tests specifically one test for the farmer is flaky - this seems to have been recently introduced possibly due to changes in aiohttp, but the exact reasons for flakiness are unknown

The end goal of the test is to make sure the server rejects the SSL connection - it seems that due to aiohttp internals, SSL errors are typically silent on the server and the client may not get a consistent error for why the connection was dropped. (see aio-libs/aiohttp#7325)

Adjust the flaky test as follows:
Using asyncio debug mode and setting the test to capture the log, we can look for the SSL certificate failure in the log files as it is output when asyncio is in debug mode. This is further complicated in that on some platforms, when asyncio is in debug mode, an exception is raised that is not catchable by pytest and fails the test - so a new exception handler is used to ignore the SSL exception, as we are only testing the log output.

This is currently very stable in CI. This replaces the fix in #17899

I think the value of this particular test is debatable; I currently don't think there is any way to misconfigure the code such that this test would pass - it would have to be some error in SSL, or if all SSL cert verification was turned off.

[coveralls-official]

Pull Request Test Coverage Report for Build 8944179727

Details

• 48 of 48 (100.0%) changed or added relevant lines in 1 file are covered.
• 9 unchanged lines in 6 files lost coverage.
• Overall coverage increased (+0.03%) to 90.697%

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Files with Coverage Reduction	New Missed Lines	%
chia/rpc/rpc_server.py	1	88.67%
chia/wallet/util/wallet_sync_utils.py	1	86.54%
chia/timelord/timelord_launcher.py	1	69.92%
chia/server/node_discovery.py	1	80.5%
chia/introducer/introducer.py	1	78.26%
chia/wallet/wallet_node.py	4	88.6%

Totals
Change from base Build 8943202463:	0.03%
Covered Lines:	98057
Relevant Lines:	108058

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💛 - Coveralls