8381004: [lworld] FieldLayoutInfo use an aggregate for nonoop_acmp_map entries

[walulyai]

Hi,

Please review this patch to replace Pair with a simple aggregate for entries in _nonoop_acmp_map to improve code readability.

Testing: GHA

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Issue

• JDK-8381004: [lworld] FieldLayoutInfo use an aggregate for nonoop_acmp_map entries (Enhancement - P5)

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[walulyai]

We already do this reset on L1475

[bridgekeeper]

👋 Welcome back iwalulya! A progress list of the required criteria for merging this PR into lworld will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

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See the Progress checklist in the description for automated requirements.

[mlbridge]

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