RFR: JDK-8154011: Make TraceDeoptimization a diagnostic flag

[Tom Rodriguez]

On Fri, 3 Dec 2021 16:14:50 GMT, Tobias Holenstein <duke at openjdk.java.net> wrote:

> Make TraceDeoptimization available in a product build.
> 
> I checked that performance is not affected on Aurora.

Some of those might be benign, thought they are inconsistent.  The DEOPT PACKING messages are controlled by PrintDeoptimizationDetails, but DEOPT UNPACKING is controlled by TraceDeoptimization.  The REALLOC messages could likely be under PrintDeoptimizationDetails.  Maybe it would make sense to rationalize them a bit and make PrintDeoptimizationDetails diagnostic as well.

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PR: https://git.openjdk.java.net/jdk/pull/6703