[stable/redis-ha]: allow DNS requests to CIDR 169.254.0.0/16 in haproxy NetworkPolicy

[lgatellier]

What this PR does / why we need it:

This PR adds a rule to the redis-ha haproxy NetworkPolicy to allow haproxy pods to send DNS requests to CIDR 169.254.0.0/16.

This rule is already present in the redis-ha NetworkPolicy.

Special notes for your reviewer:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• DCO signed
• Chart Version bumped
• Title of the PR starts with chart name (e.g. [stable/mychartname])

[DandyDeveloper]

@lgatellier I think the idea behind this originally was to intentionally not included it when these options were added originally.

I'd prefer people have full control as there will be bare metal / other cloud providers where this private DNS could be used for something else and end up causing some poor admin a security headache without realizing.