Nashville alum Charles Esten is among those remembering late actress Hayden Panettiere after she died unexpectedly Sunday at the age of 36. Esten, who played Deacon Claybourne on the ABC drama, also lamented a missed opportunity to reconnect with his former co-star before she died. He and wife Patty Hanson were in Greenville, South Carolina, where Panettiere died on Sunday, on Friday night while he was on tour. “Patty and I were not only in Greenville, SC this past Friday night for one of my shows, we were actually in Judson Mills, itself (where the venue is located),” Esten wrote in a comment with his Instagram post about his memories…