[jdk21u] RFR: 8313676: Amend TestLoadIndexedMismatch test to target intrinsic directly

[Aleksey Shipilev]

On Wed, 9 Aug 2023 08:59:55 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Clean backport to improve the test.
> 
> Additional testing:
>  - [x] macosx-aarch64-server-fastdebug, the affected test is still sensitive to original fix

Testing is clean. Push approval is here.

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PR Comment: https://git.openjdk.org/jdk21u/pull/49#issuecomment-1673065675