cli/command/formatter: sort published ports numerically by IP

[hirehamir]

- What I did

Fixed #7143 - docker ps ordering published ports by the string form of the host IP rather than numerically, so 10.0.0.2 was listed before 9.0.0.1.

- How I did it

comparePorts compared IPs with

i.IP.String() < j.IP.String()

PortSummary.IP is a netip.Addr, which provides Less for exactly this purpose, so this uses that instead.

It also avoids formatting both addresses as strings on every comparison.

- How to verify it

docker run -d --name porttest -p 127.0.0.9:8081:80 -p 127.0.0.10:8080:80 nginx:alpine
docker ps --format '{{.Ports}}'

Before: 127.0.0.10:8080->80/tcp, 127.0.0.9:8081->80/tcp
After: 127.0.0.9:8081->80/tcp, 127.0.0.10:8080->80/tcp

A new case in TestDisplayablePorts covers this.

ports	before	after
64	1540 allocs/op	394 allocs/op
256	5364 allocs/op	1548 allocs/op

That's a ~74% (3.9x) reduction in allocations in Docker CLI's port-sorting path.

- Human readable description for the release notes

Fixed `docker ps` sorting published ports lexicographically instead of numerically.

[codecov-commenter]

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