Add a `port-range` attribute to `haproxy-route-tcp` to allow mapping from mutliple frontend ports to multiple backend ports

[Thanhphan1147]

Enhancement Proposal

• We need to be able to allow the requirer to specify a range of port that it wants to be mapped 1-to-1 from the frontend. For example: if a range of 10500-10600 is requested, then every port in that range on the frontend is mapped to the same port on the backend, e.g <haproxy_ip>:10512 will map to <backend_server_ip>:10512
• Conflicts will need to be checked for the entire port range, if one port in the range is conflicting then the entire backend will be considered invalid.
• The port part of each server entries in the backend will be removed if port-range is set.
• every port in the range will need to be used in open_ports call at the end of the reconcile loop.

Impact

High (The feature has short-term technical value)

Impact Rationale

No response

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The internal ticket has been created: https://warthogs.atlassian.net/browse/ISD-5858.

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[skatsaounis]

It is also commented here: #403 (comment)