RFR: 8337783: Use THROW_NULL instead of THROW_0 in pointer contexts in misc runtime code

[Aleksey Shipilev]

On Sat, 3 Aug 2024 23:41:48 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this trivial change that, in misc. runtime code where a pointer
> value is required, replaces uses of THROW_0 and THROW_MSG_0 with THROW_NULL
> and THROW_MSG_NULL respectively.
> 
> Testing: mach5 tier1

Current changes look okay. Same as in other PR, I have not checked these caught all the instances of `THROW_*` in those files.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20457#pullrequestreview-2219204335