Parse Solr facet range date and time with proper format

[danielcoelhocgu]

References

• Fixes Error when running solr-export-statistics command #11192

Description

When running solr-export-statistics CLI command with no arguments, it queries Solr to get the available date ranges in the index. When parsing these date values, an exception is being thrown due to a format mismatch. This PR fixes this bug.

Instructions for Reviewers

Changes were made to the command on this commit.
Now I just added an explicit DateTimeFormatter to the YearMonth.parse method call.

Checklist

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[tdonohue]

👍 Thanks @danielcoelhocgu ! Verified the bug & verified this PR fixes it.

[dspace-bot]

Successfully created backport PR for dspace-9_x:

• [Port dspace-9_x] Parse Solr facet range date and time with proper format #11196