Add missing yields and other fixes

[awharn]

What It Does

Fixes SonarCloud bugs

How to Test

Review Checklist I certify that I have:

• [ ] tested my changes
• [ ] added/updated automated tests
• [x] updated the changelog
• [x] followed the contribution guidelines

Additional Comments

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (2a4cba2) 91.06% compared to head (52ea428) 91.07%. Report is 1 commits behind head on master.

Files	Patch %	Lines
...ckages/imperative/src/imperative/src/Imperative.ts	97.29%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2055 +/- ## ======================================= Coverage 91.06% 91.07% ======================================= Files 636 636 Lines 18967 18965 -2 Branches 3910 3976 +66 ======================================= - Hits 17273 17272 -1 + Misses 1693 1692 -1 Partials 1 1 ```

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[sonarcloud[bot]]

Quality Gate failed

Failed conditions
48.8% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[awharn]

Unfortunately, there is no good way to tell if this fixes all the bugs on SonarCloud or not. More work may need to be done after this PR is merged.