**Summary**
Add static mapping support for VPP
**Use case**
**Additional information**
Proposed CLI:
```
set vpp nat44 static rule 10 outbound-interface 'eth0'
set vpp nat44 static rule 10 destination address 192.168.122.10 # optional, if not set outbound interface ip address is used
set vpp nat44 static rule 10 destination port 6545 # optional
set vpp nat44 static rule 10 protocol tcp|udp|icmp|all # optional, defaults to "all"
set vpp nat44 static rule 10 translation address 100.64.0.10
set vpp nat44 static rule 10 translation port 64010 # optional
```
Ref https://s3-docs.fd.io/vpp/24.10/cli-reference/clis/clicmd_src_plugins_nat_nat44-ed.html#nat44-add-static-mapping
https://github.com/FDio/vpp/blob/stable/2410/src/plugins/nat/nat44-ed/nat44_ed.api