SyncCache<...>.invalidateAll() is not calling/triggering the method annotated with @CacheInvalidate(all = true)

### Expected Behavior

```
@Inject
SyncCache cache;

@BeforeEach
void each() {
cache.invalidateAll();
}

@Test
void singleItemIsCached() {
final var cacheKey = "cacheKey";

assertThat(serviceWithCache.getCacheSize()).isEqualTo(0);

final var cachedValue = serviceWithCache.cachedGet(cacheKey);
...
}

@Test
void multipleItemsAreCached() {
final var items = 5;
final var cacheKey = "cacheKey";

assertThat(serviceWithCache.getCacheSize()).isEqualTo(0);
....
}
```

In each test I expect that the number of entries in the internal cache object should be 0.

ServiceWithCacheExplictResetTest behaves as expected but doesn't use micronaut's cache invalidation

### Actual Behaviour

`cache.invalidateAll()` doesn't trigger calls to `reset()`
```
private final Map cachedItems = new LinkedHashMap<>();
...

@CacheInvalidate(all = true)
public void reset() {
cachedItems.clear();
}
```

### Steps To Reproduce

1. Pull https://github.com/jonathanptew/micronaut-cache-example/
2. Run tests
3. ServiceWithCacheInvalidateResetTest fails on subsequent tests where the size of the cache is > 0
4. ServiceWithCacheExplictResetTest behaves as expected

### Environment Information

❯ mvn --version
Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d)
Maven home: /usr/local/Cellar/maven/3.8.1
Java version: 16.0.2, vendor: Homebrew, runtime: /usr/local/Cellar/openjdk/16.0.2/libexec/openjdk.jdk/Contents/Home
Default locale: en_NZ, platform encoding: UTF-8
OS name: "mac os x", version: "11.5.2", arch: "x86_64", family: "mac"

### Example Application

https://github.com/jonathanptew/micronaut-cache-example/

### Version

2.5.13

Start by reproducing the failure in ServiceWithCacheInvalidateResetTest from the linked micronaut-cache-example, comparing it with ServiceWithCacheExplictResetTest. Trace SyncCache.invalidateAll() and the @CacheInvalidate(all = true) reset() method to determine why reset() is not triggered. Done means the invalidation path clears cachedItems and the subsequent tests pass.

Written by the indexing model from the issue text.