RFR: 8373145: [BACKOUT] Remove ThreadLocalAllocBuffer::_reserve_for_allocation_prefetch

[Vladimir Kozlov]

On Fri, 5 Dec 2025 16:09:45 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Clean revert of [JDK-8371643](https://bugs.openjdk.org/browse/JDK-8371643) to reduce CI noise.
> 
> `runtime/cds/appcds/methodHandles/MethodHandlesSpreadArgumentsTest.java` with `-XX:+UseZGC -XX:+UseCompactObjectHeaders` fails 10% of the time.
> 
> After the revert, the test passes 2K runs.

Good.

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28679#pullrequestreview-3545668409