Tiny supportability nit: today we emit these log messages when adding a write block to an index:

```
[2022-03-22T19:43:26,897][INFO ][o.e.c.m.MetadataIndexStateService] [node_t1] adding block write to indices [[test-blocks/eLkrYpm_S3WNemfWpXrhPA]]
[2022-03-22T19:43:26,933][INFO ][o.e.c.m.MetadataIndexStateService] [node_t1] completed adding block write to indices [test-blocks]
```

This is kind of confusing, a `block write` sounds like we're writing a block of data. It's not clear that `write` is variable (we also say `block read`) or the name of a block setting. I think we should word this as `adding [index.blocks.write] block to indices` instead.
server/src/main/java/org/elasticsearch/cluster/metadata/MetadataIndexStateService.java
}
            }
            shardLimitValidator.validateShardLimit(currentState, indices);
            if (indicesToOpen.isEmpty()) {
                return currentState;
            }
            logger.info(() -> {
                final StringBuilder indexNames = new StringBuilder();
                Strings.collectionToDelimitedStringWithLimit(
                    indicesToOpen.stream().map(i -> (CharSequence) i.getIndex().toString()).toList(),
                    ",",
                    "",
                    "",
                    512,
                    indexNames
                );
                return "opening indices [" + indexNames + "]";
            });
            final Metadata.Builder metadata = Metadata.builder(currentState.metadata());
            final ClusterBlocks.Builder blocks = ClusterBlocks.builder(currentState.blocks());
            final Version minIndexCompatibilityVersion = currentState.getNodes().getMaxNodeVersion().minimumIndexCompatibilityVersion();
            for (IndexMetadata indexMetadata : indicesToOpen) {
                final Index index = indexMetadata.getIndex();
                if (indexMetadata.getState() != IndexMetadata.State.OPEN) {
                    final Settings.Builder updatedSettings = Settings.builder().put(indexMetadata.getSettings());
                    updatedSettings.remove(VERIFIED_BEFORE_CLOSE_SETTING.getKey());
                    IndexMetadata newIndexMetadata = IndexMetadata.builder(indexMetadata)
                        .state(IndexMetadata.State.OPEN)
                        .settingsVersion(indexMetadata.getSettingsVersion() + 1)
                        .settings(updatedSettings)