Hayden Panettiere’s “second mom,” Lynsey Lonberg, detailed the troubling side of Hollywood that the late actress dealt with as a child star — including allegedly being offered pills. “She referred to me in her book [“This Is Me: A Reckoning”] as her second mother. She was like a child to me,” Lonberg told the Daily Mail. Lonberg said the “Heroes” alum, who began her acting career as an infant, “tried and tried and tried to get past her struggles, but she was an actress.” “She told me that when you go working on a set, all kinds of pills, liquor, all kinds of things are available where you can get anything you want,” Lonberg claimed to…