T5261: Add AWS load-balancing tunnel handler

[sever-sever]

Change Summary

Add AWS load-balancing tunnel handler
https://aws.amazon.com/blogs/networking-and-content-delivery/how-to-integrate-linux-instances-with-aws-gateway-load-balancer/

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T5261

Component(s) name

Proposed changes

How to test

set service aws glb script on-create '/config/scripts/tmp.sh'
set service aws glb script on-destroy '/config/scripts/tmp.sh'
set service aws glb status format 'simple'
set service aws glb status port '8282'
set service aws glb threads tunnel '4'
set service aws glb threads tunnel-affinity '1-2'
set service aws glb threads udp '4'
set service aws glb threads udp-affinity '0-3'

When the expected packed incomes from AWS-GWLB

Mar 10 18:56:27 ip-10-10-1-65.us-west-2.compute.internal systemd[1]: Started AWS GWLB Tunnel Handler.
Mar 10 18:56:41 ip-10-10-1-65.us-west-2.compute.internal gwlbtun[28839]: New interface gwi-g0W4xxxxxxp and gwo-g0Wxxxxxxp for ENI ID 8665bxxxxxxbd421 created.
Mar 10 18:56:41 ip-10-10-1-65.us-west-2.compute.internal gwlbtun[28839]: ==> Setting up simple passthrough
Mar 10 18:56:41 ip-10-10-1-65.us-west-2.compute.internal gwlbtun[28839]: Mode is CREATE, In Int is gwi-g0Wxxxxxxp, Out Int is gwo-g0Wxxxxxp, ENI is 8665bxxxxxxbd42

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly