Error Unknown key for a VALUE_NUMBER when using EWMA/Holt-Winter with Moving Average

[winglot]

When trying to use Moving Average aggregation with EWMA or Holt-Winters model (https://opensearch.org/docs/latest/opensearch/pipeline-agg/#moving_avg), the query fails with:

OpenSearch error: Unknown key for a VALUE_NUMBER in [3]: [alpha].

Tried this on both Grafana 8 and plugin version v1.2.4 and Grafana 9 with plugin v2.0.4, with the same error.

I have tracked down the error and it seems it is caused by using parseInt for alpha/betta/gamma parameters while OpenSearch expects a float.
(https://github.com/grafana/opensearch-datasource/blob/v2.0.5/src/components/QueryEditor/MetricAggregationsEditor/SettingsEditor/MovingAverageSettingsEditor.tsx#L44).
I think that changing the parseInt to parseFloat should fix the problem.

The Elasticsearch plugin works fine with the same query using Moving Average with EWMA as they do not use parseInt when getting the value for alpha/beta/gamma settings (https://github.com/grafana/grafana/blob/v9.3.6/public/app/plugins/datasource/elasticsearch/components/QueryEditor/MetricAggregationsEditor/SettingsEditor/MovingAverageSettingsEditor.tsx#L50).