caddypki,caddytls: fix data races in CA accessors and TLS storage cleanup#7410

jeffkayser2 wants to merge 1 commit intocaddyserver:mastercaddyserver/caddy:masterfrom

jeffkayser2:fix-pki-tls-data-racejeffkayser2/caddy:fix-pki-tls-data-raceCopy head branch name to clipboard