Estimate stepping batches with max_steps if max_epochs is not set

[robertomest]

What does this PR do?

Fixes #14209

Does your PR introduce any breaking changes? If yes, please list them.

None

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[rohitgr7]

thank you :)

[codecov]

Codecov Report

Merging #14317 (1dcb94c) into master (1a3fe39) will increase coverage by 15%.
The diff coverage is 100%.

❗ Current head 1dcb94c differs from pull request most recent head 1dcc5eb. Consider uploading reports for the commit 1dcc5eb to get more accurate results

@@            Coverage Diff            @@
##           master   #14317     +/-   ##
=========================================
+ Coverage      61%      76%    +15%     
=========================================
  Files         331      332      +1     
  Lines       26637    26891    +254     
=========================================
+ Hits        16351    20429   +4078     
+ Misses      10286     6462   -3824