Potential Race Condition against Segment Tier during Reload All Segments

## Description
We fetch the `IndexLoadingConfig` once here:
https://github.com/apache/pinot/blob/50e061f466769e2525e32eda370b44fcf0e848e1/pinot-core/src/main/java/org/apache/pinot/core/data/manager/BaseTableDataManager.java#L625

Then we submit tasks that reload individual segments to the reload/refresh executor, where each task do set the tier to the shared `IndexLoadingConfig` object based on the segment itself:

https://github.com/apache/pinot/blob/50e061f466769e2525e32eda370b44fcf0e848e1/pinot-core/src/main/java/org/apache/pinot/core/data/manager/BaseTableDataManager.java#L1002-L1006

## Impact
This can cause problem where segments would be preprocessed with a wrong config if tier overwrite is present in table config, when the instance has segments on different tiers.