Increase gateway memory limit

[ReToCode]

Changes

• Increase 3scale-kourier-gateway memory limit

Fixes https://github.com/knative/serving/issues/15052

Release Note

The default memory limit of 3scale-kourier-gateway was increased to prevent OOMKilled on peak load scenarios

[knative-prow[bot]]

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[ReToCode]

/assign @skonto

Tested in https://github.com/knative/serving/pull/15060.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 62.31%. Comparing base (3655396) to head (6da3cc4). Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1236 +/- ## ========================================== + Coverage 60.63% 62.31% +1.67% ========================================== Files 24 24 Lines 2002 1632 -370 ========================================== - Hits 1214 1017 -197 + Misses 726 553 -173 Partials 62 62 ```

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[skonto]

/lgtm

[skonto]

Do we know why we need this increase (besides flakes), what is the root cause of the overhead?

[ReToCode]

That we added more stuff to encryption, we are definitely creating more envoy config with this (thus, just the tls test were flaky).