RFR: 8327098: GTest needs larger combination limit

[Aleksey Shipilev]

On Fri, 1 Mar 2024 15:01:14 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

> The current value of LogSelectionList::MaxSelections is too small, causing GTest failures.  This increases the value from 256 to 320.

It looks okay, but I have questions: 
 1. Does it happen in mainline right now?
 2. Why are we hitting it with [JDK-8324649](https://bugs.openjdk.org/browse/JDK-8324649) PR? I don't see new logging tags added there.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18083#pullrequestreview-1911396021