Add loadBalancerIP Configuration to Helm Chart

[rafaelperoco]

Overview

This PR introduces the ability to specify a loadBalancerIP in our Helm Chart, catering to environments where MetalLB is not set for automatic IP assignment.

Rationale

In setups where MetalLB lacks auto-assignment, specifying a fixed IP for the Load Balancer is necessary. This update enhances our Helm Chart's flexibility and compatibility in diverse network configurations.

Testing

• Deployed the updated Helm Chart in an environment with MetalLB in non-autoassign mode.
• Set loadBalancerIP in values.yaml and confirmed the correct assignment to the Load Balancer service.
• Ensured no impact on environments with autoassign-enabled MetalLB.

Changes

• [x] New feature (non-breaking change which adds functionality)
• [x] I have updated the documentation accordingly.
• [x] My changes generate no new warnings.

Additional Notes

Open for feedback and further discussion.

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Thank you for reviewing this PR. Looking forward to any comments or suggestions for improvement.

[Qonstrukt]

Thanks for your contribution! This is the last change to this chart. I'm going to make the switch to linuxserver/docker-unifi-network-application after this.