Get proper errer message when the connection to an ICAP Server fails

[unglaublicherdude]

this is in response to this thread.

Previous Behaviour: When the client was not able to connect the stream was not set, resulting in an error when calling the socket_set_timeout function.

Changed Behaviour: When the is not able to connect the RuntimeException will be thrown with proper ErrorMessage and ErrorCode.

[unglaublicherdude]

Is there something that still hast to be done by me?
The steps failing were not touched by me. Here is the workflowfile invalid. https://github.com/nextcloud/files_antivirus/actions/runs/10211785337/job/28266395368

[joshtrichards]

The lint test is failing due to formatting and at least one of the unit tests I sampled is failing due to a difference in the error output in the new test in this PR:

Failed asserting that exception message 'Cannot connect to "tcp://nothinghere:8080": php_network_getaddresses: getaddrinfo for nothinghere failed: Temporary failure in name resolution (code 0)' contains 'Cannot connect to "tcp://nothinghere:8080": php_network_getaddresses: getaddrinfo for nothinghere failed: Name or service not known (code 0)'.

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