fixing the ingress gateway auth policy when no matchlabels are provided

General MR

Summary

ensuring this will work properly even if there are no match labels

Relevant logs/screenshots

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Linked Issue

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Upgrade Notices

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changed milestone to %2.25.0

added kindbug priority2 statusreview teamTools & Automation labels

assigned to @andrewshoell

marked this merge request as ready

requested review from @jfoster, @nicole.dupree, @mgoloski, @matt.boyer, and @daniel.dides

approved this merge request

mentioned in commit fc58931e

merged

mentioned in merge request big-bang/bigbang!4112 (merged)