8357576: FieldInfo::_index is not initialized by the constructor

[matias9927]

FieldInfo::_index is not initialized in either of the FieldInfo constructors so this patch adds initialization to both constructors. Verified with tier 1-5 tests

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Progress

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Issue

• JDK-8357576: FieldInfo::_index is not initialized by the constructor (Bug - P3)

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[bridgekeeper]

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[mlbridge]

Webrevs

• 00: Full (e059e29a)

[sendaoYan]

Should we update the copyright year to 2025