8374629: Type test pattern with array type in switch fails to parse

[biboudis]

The parser was too strict when parsing > in the classification of a label on whether it is an expression or pattern. There are still occasions that after an [ or an @ an expression may follow. This PR addresses this issue.

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Issue

• JDK-8374629: Type test pattern with array type in switch fails to parse (Bug - P4)

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