Add Array.SetType() to allow updating TypeInfo

[fxamacker]

Closes #372

This feature is needed by Cadence migrations to update static types. For more details, see

• Run full Cadence 1.0 migration on TN state cadence#3096 (comment).

This PR allows updating static types of Array container.

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• Targeted PR against main branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 69.23077% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 65.08%. Comparing base (86040b3) to head (431511d).

Files	Patch %	Lines
array.go	69.23%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@                    Coverage Diff                     @@
##           feature/stable-cadence     #374      +/-   ##
==========================================================
+ Coverage                   65.00%   65.08%   +0.07%     
==========================================================
  Files                          14       14              
  Lines                        8359     8372      +13     
==========================================================
+ Hits                         5434     5449      +15     
+ Misses                       2228     2227       -1     
+ Partials                      697      696       -1     

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[turbolent]

Nice! Thank you for adding this! 🙏

[turbolent]

👌