perf disasm: Use disasm_line__free() to properly free disasm_line

perf disasm: Use disasm_line__free() to properly free disasm_line

The structure disasm_line contains members that require dynamically
allocated memory and need to be freed correctly using
disasm_line__free().

This patch fixes the incorrect release in
symbol__disassemble_capstone().

Fixes: 6d17edc113de ("perf annotate: Use libcapstone to disassemble")
Signed-off-by: Li Huafei <lihuafei1@huawei.com>
Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: sesse@google.com
Cc: kjain@linux.ibm.com
Link: https://lore.kernel.org/r/20241019154157.282038-1-lihuafei1@huawei.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>