Test collections refresh

[VenelinMartinov]

Related to https://github.com/pulumi/pulumi-terraform-bridge/issues/2047

Pulling out the tests from https://github.com/pulumi/pulumi-terraform-bridge/pull/2065 so that the changes in behaviour in the other PR are more visible and easy to review.

This adds tests for refreshes on collections for:

• list/set/map
• RPC/non-PRC
• null/empty/non-empty collections
• nil/non-nil cloud values for the nil collections
• top-level collections/nested collections
• Properties with a value override in Create/ ones without - this is a behaviour observed in AWS and GCP labels and some other providers, mainly seen around maps.

The goal of the tests is to:

• Ensure we do not regress on behaviour in PRC vs non-PRC
• Ensure we do not regress on behaviour in PRC as we change the implementation in https://github.com/pulumi/pulumi-terraform-bridge/pull/2073 / https://github.com/pulumi/pulumi-terraform-bridge/pull/2065

I've flattened the matrix in order to allow us to annotate/skip individual test cases.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 61.29%. Comparing base (f5a6151) to head (15d18ac). Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2072 +/- ## ========================================== + Coverage 61.19% 61.29% +0.09% ========================================== Files 339 339 Lines 45130 45085 -45 ========================================== + Hits 27617 27633 +16 + Misses 15992 15932 -60 + Partials 1521 1520 -1 ```

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