Fixed feign-micrometer exception handling.

[r-dimitrov]

The current MR improves exception handling for feign-micrometer clients. Previously, exceptions such as 404, 400, 500, etc., were not marked with error=true in the Observation and thus were not reported in the trace as errors.

The exception declaration has been changed from (FeignException ex) to (Exception ex), as none of the supported clients (e.g., Apache HttpClient, OkHttp) throws FeignException, but rather client-specific exceptions.

The fix is currently in production in my organization, and it has been working effectively.

Fixes #2566

[github-actions]

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[r-dimitrov]

I've just added some fixes, as there were exceptions when some clients had defined a custom ErrorDecoder. The input stream is consumed, and the decoder throws an exception. This way, we are copying the input stream so it can be used multiple times.