Add OrderedMap.SetType() to allow updating TypeInfo

[fxamacker]

Closes #373

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 OrderedMap 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

[turbolent]

Nice! Thank you for adding this!

Same feedback as for the related PR, #374

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.09%. Comparing base (e1a76d5) to head (8e77472).

Additional details and impacted files

@@                    Coverage Diff                     @@
##           feature/stable-cadence     #375      +/-   ##
==========================================================
+ Coverage                   66.03%   66.09%   +0.06%     
==========================================================
  Files                          14       14              
  Lines                        8225     8233       +8     
==========================================================
+ Hits                         5431     5442      +11     
+ Misses                       2115     2113       -2     
+ Partials                      679      678       -1     

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