RFR: 8337563: NMT: rename MEMFLAGS to MemFlag

[Coleen Phillimore]

On Wed, 7 Aug 2024 17:13:06 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

> Please review this cleanup, where we rename `MEMFLAGS` to `MemType`.
> 
> `MEMFLAGS` implies that we can use more than one at the same time, but those are exclusive values, so `MemType` is much more suitable name.
> 
> There is a bunch of other related cleanup that we can do, but I will leave for follow up issues such as [NMT: rename NMTUtil::flag to NMTUtil::type](https://bugs.openjdk.org/browse/JDK-8337836)

I like NMT::MemType 3 points.

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PR Comment: https://git.openjdk.org/jdk/pull/20497#issuecomment-2315202137