[processor/{deltatorate, metricsgeneration}] Add CODEOWNERS (#15375)

* [processor/deltatorate] Add CODEOWNERS

* Also add `metricsgeneration`

* Update ALLOWLIST

* Remove @hossain-rayan

.github/ALLOWLIST

@@ -25,7 +25,5 @@ internal/sharedcomponent
 internal/tools
 pkg/batchperresourceattr
 pkg/experimentalmetricmetadata
-processor/deltatorateprocessor
-processor/metricsgenerationprocessor
 receiver/dotnetdiagnosticsreceiver
 testbed

.github/CODEOWNERS

@@ -114,11 +114,13 @@ pkg/winperfcounters/ @open-telemetry/collector-c
 
 processor/attributesprocessor/ @open-telemetry/collector-contrib-approvers @boostchicken
 processor/cumulativetodeltaprocessor/ @open-telemetry/collector-contrib-approvers @TylerHelmuth
+processor/deltatorateprocessor/ @open-telemetry/collector-contrib-approvers @Aneurysm9
 processor/filterprocessor/ @open-telemetry/collector-contrib-approvers @boostchicken
 processor/groupbyattrsprocessor/ @open-telemetry/collector-contrib-approvers
 processor/groupbytraceprocessor/ @open-telemetry/collector-contrib-approvers @jpkrohling
 processor/k8sattributesprocessor/ @open-telemetry/collector-contrib-approvers @owais @dmitryax
 processor/logstransformprocessor/ @open-telemetry/collector-contrib-approvers @djaglowski @dehaansa
+processor/metricsgenerationprocessor/ @open-telemetry/collector-contrib-approvers @Aneurysm9
 processor/metricstransformprocessor/ @open-telemetry/collector-contrib-approvers @dmitryax
 processor/probabilisticsamplerprocessor/ @open-telemetry/collector-contrib-approvers @jpkrohling
 processor/redactionprocessor/ @open-telemetry/collector-contrib-approvers @leonsp-ai @dmitryax @mx-psi