Fix excessive synchronization in contract on Dagger.DArray

[mofeing]

Closes #123

[jofrevalles]

Can we add some tests? :)

[Todorbsc]

Can we add some tests? :)

Yeah, we should. Currently, we are trying to fix some things in order to make the code work.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 56 lines in your changes are missing coverage. Please review.

Project coverage is 80.46%. Comparing base (c2ef9db) to head (8129c7e).
Report is 18 commits behind head on master.

❗ Current head 8129c7e differs from pull request most recent head 7231b46

Please upload reports for the commit 7231b46 to get more accurate results.

Files	Patch %	Lines
ext/TenetDaggerExt.jl	0.00%	56 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #124      +/-   ##
==========================================
+ Coverage   79.30%   80.46%   +1.16%     
==========================================
  Files          17       11       -6     
  Lines         865      640     -225     
==========================================
- Hits          686      515     -171     
+ Misses        179      125      -54     

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[mofeing]

Updated the code to the last Tenet and Dagger changes. Also it now calls Tenet.contract instead of OMEinsum.EinCode.

@jofrevalles I also added some tests.