Refactor and update struct stringer tests

[SupunS]

Blocker for https://github.com/onflow/cadence/pull/3660

Description

Actual change is in https://github.com/onflow/cadence/commit/247a13d3eabdbe98af126ef762fbf527caeca4a7

Also synced with master again.

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• [ ] Targeted PR against master branch
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [x] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels

[github-actions[bot]]

Cadence Benchstat comparison

This branch with compared with the base branch onflow:feature/string-templates commit 4f9e343b48a518487f8e273b49c92855cfc537d1 The command for i in {1..N}; do go test ./... -run=XXX -bench=. -benchmem -shuffle=on; done was used. Bench tests were run a total of 7 times on each branch.

Collapsed results for better readability

[turbolent]

Sorry for the extra hassle getting this in!

[SupunS]

no problem! It's just happened to be dependent on the order of PRs merged. I didn't realize it either.