RFR: 8298293: NMT: should os::realloc() API take flags as arguments?

[David Holmes]

On Mon, 6 Feb 2023 06:33:27 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> - remove MEMFLAGS from os::realloc() and NMTPreInit::handle_realloc() - why should caller have to specify this if the only allowed value is the one in the malloc header

@tstuefe  that was the original question this issue was asking but the determined answer was "yes it should take the flags" - the reason being that when `realloc(null,size)` is used as an alias for `malloc(size)` then we need the flags

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PR: https://git.openjdk.org/jdk/pull/12422