fix local rank display bug in info message

[awaelchli]

What does this PR do?

Fixes a visual bug.
The env variable LOCAL_RANK is not available in all clusters and may be named differently. To resolve this, we will refer to the cluster environment / plugin to determine that value.

Reported in a discussion #7275

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[codecov]

Codecov Report

Merging #7395 (bbacc8d) into master (651f93a) will decrease coverage by 1%.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #7395    +/-   ##
=======================================
- Coverage      92%     91%    -1%     
=======================================
  Files         200     200            
  Lines       12982   13340   +358     
=======================================
+ Hits        11933   12163   +230     
- Misses       1049    1177   +128