Add network tcp-check command

[sfc-gh-ikryvanos]

This PR introduces a new service network with new subcommand tcp-check to check TCP connectivity from sansshell target(s) to the given host and port

TODO:

• cover with unit and integration tests

Is it was tested

Yes, on local

$ sanssh --targets=localhost network tcp-check 500.500.500:8080
- From target localhost:50042 to 500.500.500:8080, status: Failed - Connection refused
Connectivity check completed.

$ sanssh --targets=localhost network tcp-check google.com:80 --timeout 5
- From target localhost:50042 to google.com:80, status: Succeed
Connectivity check completed.

$ sanssh --targets=localhost network tcp-check 500.500:1 --timeout 5
- From target localhost:50042 to 500.500:1, status: Failed - No such host
Connectivity check completed.

$ sanssh --targets=localhost network tcp-check 10.0.5.3:1 --timeout 5
- From target localhost:50042 to 10.0.5.3:1, status: Failed - Connection timed out
Connectivity check completed.

How its look like

[sfc-gh-ikryvanos]

@sfc-gh-srhodes feel free to resolve discussions where issue being solved

[sfc-gh-srhodes]

Could you move the license check change to a different PR? It looks logically separate from the rest.

[sfc-gh-ikryvanos]

@sfc-gh-srhodes

Could you move the license check change to a different PR? It looks logically separate from the rest.

Done #473