[velox] refactor: Rename velox casting utilities to camelCase convention

[juwentus1234]

Summary:
X-link: facebookincubator/velox#15614

X-link: facebookincubator/nimble#333

Renamed three function templates in velox's casting utilities to follow the camelCase naming convention:

• checked_pointer_cast → checkedPointerCast
• static_unique_pointer_cast → staticUniquePointerCast
• is_instance_of → isInstanceOf

This change affects the function definitions in /data/users/ericjjj/fbsource/fbcode/velox/common/Casts.h and all call sites within the velox codebase and related projects that use velox namespaced functions.

Files updated:

• Function definitions in velox/common/Casts.h
• Velox core files: core/PlanNode.cpp, exec/Exchange.cpp, exec/Task.cpp, common/memory/MemoryPool.cpp, tool/trace/TopNRowNumberReplayer.cpp
• Test file: velox/common/testutil/tests/CastsTest.cpp - updated all test cases
• DataInfra/Sequence files that use facebook::velox:: namespace prefix (8 files)

This refactoring improves consistency with velox's naming conventions while maintaining backward compatibility with external codebases that use their own implementations.

Differential Revision: D87806227

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Refactors Velox casting utilities to use camelCase function names and updates all affected call sites, keeping behavior the same while aligning with naming conventions.

File-Level Changes

Change	Details	Files
Rename Velox casting utility templates to camelCase and propagate changes to all call sites.	Update casting utility template names in the core Velox casting header to camelCase equivalents while preserving signatures and behavior Adjust all internal Velox call sites to use the new camelCase casting helpers instead of the old snake_case versions Update Presto native execution shuffle operators to use the new checkedPointerCast helper when downcasting stream and batch pointers Refresh tests and external/related project code that reference the casting utilities to the new names to ensure compilation and coverage remain intact	velox/common/Casts.h velox/core/PlanNode.cpp velox/exec/Exchange.cpp velox/exec/Task.cpp velox/common/memory/MemoryPool.cpp velox/tool/trace/TopNRowNumberReplayer.cpp velox/common/testutil/tests/CastsTest.cpp presto-native-execution/presto_cpp/main/operators/LocalShuffle.cpp presto-native-execution/presto_cpp/main/operators/ShuffleRead.cpp DataInfra/Sequence/... (8 files)

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