Make chains QPS and Burst configuration consistent

[khrm]

Earlier release of chains multiply default cfg by 2. In pipelines also, we do this. Same in Results. This makes chains behaviour consistent with all other controllers.

Changes

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• [ ] Has Docs included if any changes are user facing
• [ ] Has Tests included if any functionality added or changed
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Release Notes

NONE

[khrm]

/assign @lcarva @vdemeester

[khrm]

/assign @wlynch

[khrm]

@lcarva @wlynch @chitrangpatel Can we get this merge for this release?

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lcarva, vdemeester

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