Stop consuming fio, gdb-python and mold from internal forks in favor of upstream packages for LTS upgrade

PR URL: https://www.github.com/delphix/linux-pkg/pull/325

Author: palash-gandhi

package-lists/build/main.pkgs

@@ -16,17 +16,14 @@ delphix-sso-app
 drgn
 docker-python-image
 dwarves
-fio
 fluentd-gems
-gdb-python
 grub2
 host-jdks
 libkdumpfile
 make-jpkg
 makedumpfile
 masking
 misc-debs
-mold
 nfs-utils
 performance-diagnostics
 ptools