bugfix/3185 transpose

[lezwon]

What does this PR do?

Fixes #3185
Fixes #2903

tensor.t() breaks on XLA for 1-D tensors. Replaced it with tensor.transpose(-1, 0).

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[codecov]

Codecov Report

Merging #3252 into master will decrease coverage by 0%.
The diff coverage is 75%.

@@          Coverage Diff           @@
##           master   #3252   +/-   ##
======================================
- Coverage      90%     90%   -0%     
======================================
  Files          86      86           
  Lines        8095    8155   +60     
======================================
+ Hits         7305    7319   +14     
- Misses        790     836   +46     

[williamFalcon]

@lezwon mind adding a test so this doesn’t happen again?

The test is to use some of the step result tests with TPUs which you can copy over into the TPU section

[lezwon]

@williamFalcon I had to make a couple of tweaks to get the tests working. They aren't related to this issue but might have been bugs needed to be fixed.

[Borda]

LGTM 🐰

[SkafteNicki]

LGTM