SDKv2 Add detailed diff tests for plain attribute types

[VenelinMartinov]

This adds integration tests around detailed diff for string, list, set and map attributes.

Quite a few issues with:

• Handling empty collections being removed/added - these are not shown in most cases
• Adding/removing elements being duplicated in the detailed diff output
• Outright wrong diff for set element removed middle and set element added front similar to Wrong diff returned for removed items in TF sets #2103
• Non-deterministic detailed diffs for set element additions/removals

Opened follow-up issues:

• Detailed diff empty collection diffs not shown #2233
• Detailed diff duplicated collection diffs #2234
• Detailed diff for set element changes shows more additions/removals than present #2235
• Non-deterministic detailed diff output for set element addition/removal #2325

Related to #1895

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.98%. Comparing base (0a9542d) to head (671e6fe).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2159   +/-   ##
=======================================
  Coverage   56.98%   56.98%           
=======================================
  Files         366      366           
  Lines       50056    50056           
=======================================
+ Hits        28524    28526    +2     
+ Misses      19964    19963    -1     
+ Partials     1568     1567    -1     

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[iwahbe]

This is super helpful. Thanks for putting it together.

[VenelinMartinov]

Discovered another fun issue here: #2325

[pulumi-bot]

This PR has been shipped in release v3.90.0.