### Elasticsearch Version

8.6.0-SNAPSHOT

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

N/A

### Problem Description

We see 8.6.0 master nodes (512MB heap) repeatedly dying with OOME when attempting to do a snapshot with GCS snapshot repository. This is not reproducible with prior versions and we suspect that this is caused by https://github.com/elastic/elasticsearch/pull/90282.

### Steps to Reproduce

1. Start a cluster in a containerized environment; master nodes have 1GB of memory, 512MB of heap
2. Setup a GCS snapshot repository
3. Create a snapshot of the cluster.
4. The master node will OOM with the following message:

```
[5383.050s][warning][gc,alloc] elasticsearch[i6][snapshot][T#26]: Retried waiting for GCLocker too often allocating 256 words
[5383.053s][warning][gc,alloc] elasticsearch[i6][snapshot][T#14]: Retried waiting for GCLocker too often allocating 1029 words
java.lang.OutOfMemoryError: Java heap space
```

### Logs (if relevant)

_No response_
server/src/test/java/org/elasticsearch/threadpool/ThreadPoolTests.java
}
    public void testSchedulerWarnLogging() throws Exception {
        final ThreadPool threadPool = new TestThreadPool(
            "test",
            Settings.builder().put(ThreadPool.SLOW_SCHEDULER_TASK_WARN_THRESHOLD_SETTING.getKey(), "10ms").build()
        );
        final Logger logger = LogManager.getLogger(ThreadPool.class);
        final MockLogAppender appender = new MockLogAppender();
        appender.start();
        try {
            Loggers.addAppender(logger, appender);
            appender.addExpectation(
                new MockLogAppender.SeenEventExpectation(
                    "expected warning for slow task",
                    ThreadPool.class.getName(),
                    Level.WARN,
                    "execution of [slow-test-task] took [*ms] which is above the warn threshold of [10ms]"
                )
            );
            final Runnable runnable = new Runnable() {
                @Override
                public void run() {
                    final long start = threadPool.relativeTimeInMillis();
                    try {
                        assertBusy(() -> assertThat(threadPool.relativeTimeInMillis() - start, greaterThan(10L)));
                    } catch (Exception e) {
                        throw new AssertionError(e);
                    }
                }
                @Override