Fix grid view log try numbers
The try numbers shown in the grid view logs were showing an extra count and just not consistent with how the regular logs page works.
Fixes https://github.com/apache/airflow/issues/26194#issuecomment-1249183346 Other fixes:
- Default selection to the latest try number
- Count try number at 1 instead of 0
^ Add meaningful description above
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cc: @pierrejeambrun