Fix strategy argument for trainer

[maciej-sypetkowski]

Changelogs

• Fix trainer.trainer.strategy. Previously the argument was passed twice for Trainer construction and thus error.

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Checklist:

• Was this PR discussed in an issue? It is recommended to first discuss a new feature into a GitHub issue before opening a PR.
• Add tests to cover the fixed bug(s) or the new introduced feature(s) (if appropriate).
• Update the API documentation is a new function is added, or an existing one is deleted.
• Write concise and explanatory changelogs above.
• If possible, assign one of the following labels to the PR: feature, fix or test (or ask a maintainer to do it for you).

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discussion related to that PR

[codecov]

Codecov Report

Merging #447 (0170dcc) into main (95ece97) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##             main     #447   +/-   ##
=======================================
  Coverage   65.37%   65.37%           
=======================================
  Files          92       92           
  Lines        8253     8253           
=======================================
  Hits         5395     5395           
  Misses       2858     2858           

Flag	Coverage Δ
unittests	65.37% <0.00%> (ø)

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Components	Coverage Δ
ipu	49.14% <ø> (ø)