Fix/spl-v2 token metadata update authority field

[0x4ka5h]

removed the redundant CPI field and token metadata authority updates no longer require an extra account.

[hacktron-app]

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Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (anchor-next@e056cc1). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
tests-v2/programs/spl/src/lib.rs	50.00%	1 Missing ⚠️
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Additional details and impacted files

@@              Coverage Diff               @@
##             anchor-next    #4843   +/-   ##
==============================================
  Coverage               ?   63.47%           
==============================================
  Files                  ?      125           
  Lines                  ?    13647           
  Branches               ?        0           
==============================================
  Hits                   ?     8662           
  Misses                 ?     4985           
  Partials               ?        0           

Flag	Coverage Δ
v2	63.47% <50.00%> (?)

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