Fix depreciation for `AutoReverseDiff`.

[yebai]

Fix warnings discovered in https://github.com/TuringLang/Turing.jl/pull/2289

[coveralls]

Pull Request Test Coverage Report for Build 10330921185

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 30 unchanged lines in 10 files lost coverage.
• Overall coverage remained the same at 81.36%

---

Files with Coverage Reduction	New Missed Lines	%
src/compiler.jl	1	93.42%
ext/DynamicPPLForwardDiffExt.jl	1	83.33%
src/utils.jl	2	78.36%
src/model_utils.jl	2	37.5%
src/context_implementations.jl	2	61.51%
src/varinfo.jl	2	92.52%
src/test_utils.jl	3	85.93%
src/threadsafe.jl	5	48.25%
src/debug_utils.jl	5	53.28%
src/DynamicPPL.jl	7	46.15%
<!--	Total:	30		-->

Totals
Change from base Build 10323065547:	0.0%
Covered Lines:	2811
Relevant Lines:	3455

---

💛 - Coveralls

[codecov[bot]]

Codecov Report

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

Project coverage is 79.95%. Comparing base (142f753) to head (13561d1). Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #638 +/- ## ========================================== - Coverage 81.00% 79.95% -1.05% ========================================== Files 29 29 Lines 3470 3468 -2 ========================================== - Hits 2811 2773 -38 - Misses 659 695 +36 ```

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[mhauru]

The recent tests I added are failing, looking into it.