fix: honor disable_trace_padding in cairo_run_fuzzed_program

[MozirDmitriy]

Reason:
Previously cairo_run_fuzzed_program always passed false into CairoRunner::end_run, so the disable_trace_padding flag in CairoRunConfig only affected builtin segment padding but could not prevent padding the number of steps to a power of two in proof mode. This made its behaviour inconsistent with cairo_run and cairo_run_pie and effectively ignored part of the public configuration in fuzzed runs.

Summary:
Pass cairo_run_config.disable_trace_padding into cairo_runner.end_run in cairo_run_fuzzed_program so that fuzzed runs respect the same trace padding semantics as the main run helpers.

[gabrielbosio]

The hardcoded false has been there since cairo_run_fuzzed_program was introduced in #1344. With disable_trace_padding = false, end_run allows run_until_next_power_of_2 in proof mode.

Did you hit a concrete issue with the current behavior, or is this purely a consistency fix?