SimpleJobExplorer#getLastJobExecution does not fetch step executions

[fmbenhassine]

SimpleJobExplorer#getLastJobExecution returns the last job execution without fetching its step executions and execution contexts. This is not consistent with SimpleJobExplorer#getJobExecution where the entire object graph is returned.

Reference: https://stackoverflow.com/questions/68015813/spring-batch-jobexecution-getstepexecutions-is-empty