RFR: 8303013: Always do remembered set verification during G1 Full GC

[Thomas Schatzl]

On Tue, 28 Feb 2023 13:54:15 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> `VerifyRememberedSets` should be removed as well, in another PR.

And potentially `VerifyObjectStartArray`; both could be enabled always (after parallelization) during (Parallel GC) verification.

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PR: https://git.openjdk.org/jdk/pull/12781