[Staging] Change Tekton Vector collection to in-memory and ack enabled

[khrm]

This is to resolve missing logs issue.

[khrm]

/assign @enarha

[enarha]

/lgtm
/approve
/hold

Adding the hold label as we probably want to bump the memory limit to 3GB (.resources.requests.limits.memory). I was checking a prod instance and at regular load the memory usage was standing around 1 GB. Now with the in memory buffer, the usage will increase and it's better to avoid the OOM and pod restarts.

[openshift-ci]

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[khrm]

@enarha I have updated the memory to 3GB.

[enarha]

/lgtm
/unhold