Define non-const surface method and change CachedUniquePtr to CachedUniquePtrT to fix ATLASRECTS-4957.

Susumu Odarequested to merge
oda/athena:master-ATLASRECTS-4957-v2 into master

Define non-const surface method and change CachedUniquePtr to CachedUniquePtrT to fix ATLASRECTS-4957.

This MR replaces MR !23535 (closed).

Edited by Susumu Oda

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