RFR: 8334490: Normalize string with locale invariant `toLowerCase()`

[Lance Andersen]

On Tue, 18 Jun 2024 18:23:12 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> The test library `jdk.test.lib.Platform` uses no-arg `toLowerCase()` for string comparison, which should be avoided.

Marked as reviewed by lancea (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/19775#pullrequestreview-2126291246