feat(llc): Added a new field called push provider name in addDevice api call

[ayush221b]

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Description of the pull request

Push v2 supports adding a push_provider_name field to support creating different configurations for device and push provider.

[codecov]

Codecov Report

Merging #1107 (a370cb1) into develop (d58f727) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop    #1107   +/-   ##
========================================
  Coverage    76.10%   76.10%           
========================================
  Files          193      193           
  Lines        20726    20729    +3     
========================================
+ Hits         15773    15776    +3     
  Misses        4953     4953           

Impacted Files	Coverage Δ
packages/stream_chat/lib/src/client/client.dart	90.57% <100.00%> (ø)
...kages/stream_chat/lib/src/core/api/device_api.dart	100.00% <100.00%> (ø)

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