Migrate metric to Evaluate library for tensorflow examples 
# What does this PR do?
Currently, tensorflow examples use the `load_metric` function from Datasets library, commit migrates function call to `load` function to Evaluate library.

Fix for #18306

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@sgugger 
_The documentation is not available anymore as the PR was closed or merged._<|||||>@sgugger, Working on the other examples. 

In contrast to pytorch examples, in the tensorflow examples, some of the different tasks  (summarization, translation token-classification ) are missing requirements.txt. 


Should I add a requirements.txt to these folders? I believe this will aid in the future when we are building tests for these examples.<|||||>Yes please, that would be great!<|||||>@sgugger, all the examples have now been migrated. Will make PR open for review/merge