[tontester] Set default log verbosity level to INFO

[DanShaders]

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[github-actions]

test/tontester/src/tonlib/tonlib_cdll.py:105

Hard-coded self.client_set_verbosity_level(3) sets a global TonLib verbosity with no way to override per caller. This can inadvertently raise log level for components that expect verbosity_level=0 (e.g., TonlibClient in tonlibjson.py defaults to 0) until they explicitly reset it. Consider threading a verbosity_level parameter into TonlibCDLL (defaulting to INFO) or set it at a higher-level config so callers can opt out.