runtime: fix reflect Call word arguments

[zhouguangyuan0718]

Summary

• fix reflect Call argument conversion for indirect pointer-sized values
• cover pointer, chan, map, and unsafe.Pointer field values in a standard go test

Tests

• GOWORK=off go test ./test/go -run TestReflectCallIndirectWordArgs -count=1
• GOWORK=off llgo test ./test/go -run TestReflectCallIndirectWordArgs -count=1

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Codecov Report

✅ All modified and coverable lines are covered by tests.

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