Backport of (configurable VIP) added new config to configure virtual ip CIDRs in t-proxy into release/1.22.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #23085 to be assessed for backporting due to the inclusion of the label backport/1.22.

The below text is copied from the body of the original PR.

---

Description

This is to address: #22595

Testing & Reproduction steps

Default Config for Service Mesh

connect {
  enabled = true
}

Defined IPv4 CIDR for Virtual IP assignment

connect {
  enabled = true
  # Override default 240.0.0.0/4 virtual IP range for transparent proxy
  virtual_ip_cidr_v4 = "240.10.0.0/16"
  # virtual_ip_cidr_v6 = "..." # to define IPv6 CIDR
}

Links

n/a

PR Checklist

• updated test coverage
• external facing docs updated
• appropriate backport labels added
• not a security concern

PCI review checklist

• I have documented a clear reason for, and description of, the change I am making.

• If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.

• If applicable, I've documented the impact of any changes to security controls.

  Examples of changes to security controls include using new access control methods, adding or removing logging pipelines, etc.

---

Overview of commits

• 0fdc481

[github-team-consul-core-pr-approver]

Auto approved Consul Bot automated PR