[BUG] Allow index & cluster default refresh interval to be set as -1 (no periodic background refresh)

[ashking94]

Describe the bug
We have added a setting cluster.minimum.index.refresh_interval which is validated against index creation, updation and index template creation (from api, or snapshot restore). Currently there is a bug that disallow setting index setting as -1 if the cluster.minimum.index.refresh_interval setting is not -1. Refresh interval of -1 corresponds to no background periodic refreshes and this should be allowed to be set for both index setting index.refresh_interval as well as the cluster.default.index.refresh_interval cluster setting.

To Reproduce
Update the minimum setting to zero or higher time. After that try creating/updating an index. This will fail with validation failure.

Expected behavior
The index setting index.refresh_interval and cluster setting cluster.default.index.refresh_interval regardless of the cluster.minimum.index.refresh_interval setting's value.

[ashking94]

This is no more required as with remote store it is fine to disallow -1 refresh interval.

[ashking94]

We have revived the change since we have de-risked earlier problem of having too many translog readers with #12992.