tools: improve frr-reload delete performance for some commands

tools: improve frr-reload delete performance for some commands

Problem seen when deleting many static routes or access-lists due
to frr-reload.py issuing individual vtysh -c commands for every
line. On slow switches, this can take long enough for systemd to
time out the reload process and restart frr.  This fix uses add
logic for static routes, prefix-lists, and access-lists to gang
the changes together.

Signed-off-by: Don Slice <dslice@cumulusnetworks.com>
Ticket: CM-27856