AthenaPoolConverter: add detStore helper
Many converters require access to the DetectorStore to e.g. retrieve an "IdHelper". To reduce the boilerplate, add an accessor to the base class.
Relates to ATEAM-1020.
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Many converters require access to the DetectorStore to e.g. retrieve an "IdHelper". To reduce the boilerplate, add an accessor to the base class.
Relates to ATEAM-1020.