EFCoreActivityExecutionStore.SaveManyAsync missed handlers of IEntitySavingHandler

## Description
It seems that when saving activity execution from `DefaultCommitStateHandler` -> `activityExecutionLogRecordSink.PersistExecutionLogsAsync`, it uses `BulkUpsertExtensions.BulkUpsertAsync` to generate sql to insert records, which didn't go through DbContext, leading to all registers for `IEntitySavingHandler` were skipped.

I temporary did override the implementation for `StoreActivityExecutionLogSink` to use `activityExecutionStore.SaveAsync` instead of `SaveManyAsync` and it worked as expected

## Steps to Reproduce

1. Create a new handler of `IEntitySavingHandler` e.g: CustomEntitySavingHandler

2. Register to services

3. Run a workflow

## Expected Behavior
Expected that `CustomEntitySavingHandler` will be called on each `ActivityExecutionRecord`

## Actual Behavior
CustomEntitySavingHandler is called for others (like `StoredBookmark`) but not `ActivityExecutionRecord`