Add UOp Paircounts to JIT when Built with PyStats

[JeffersGlass]

Currently, uop pairs are only counted in a PyStats build when it is build with just the Tier 2 interpreter without the JIT.

When working on the JIT, it would be nice to see those pair counts without having to drop into a separate Tier 2 build - counting UOp pairs should be an option when building with the JIT.

Linked PRs

• gh-120953: Add UOp Paircounts to JIT when Built with PyStats #120954

[JeffersGlass]

Give that we're no longer pursueing superinstructions as a high-priority optimization, outputing UOp paircounts is no longer going to be particularly helpful. I'll close this, though it could be revived if it turns out to be useful later.