[chore][pkg/translator/azure] Add missing code owner @cparkins (#28651)

**Description:** <Describe what has changed.>
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This fixes inconsistency introduced with the creation of this package.
In #25096 @cparkins was added as a code owner in the
[metadata.yaml](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/translator/azure/metadata.yaml)
but not the top level `CODEOWNERS` file.

Co-authored-by: Alex Boten <aboten@lightstep.com>