Update TPC-H benchmark to show physical plan when debug mode is enabled

[andygrove]

Which issue does this PR close?

Closes #385 .

Rationale for this change

When we run the benchmarks with --debug we see the logical plan and optimized logical plan but we do not see the physical plan. This PR updates debug mode to also show the physical plan.

What changes are included in this PR?

Are there any user-facing changes?

No

[andygrove]

Windows build failing with:

rustup: D:\a\_temp\297de9db-5464-4aa4-af8d-ef568eeef2fe.ps1:3
Line |
   3 |  rustup default stable
     |  ~~~~~~
     | The term 'rustup' is not recognized as a name of a cmdlet, function, script file, or executable
     | program. Check the spelling of the name, or if a path was included, verify that the path is correct
     | and try again.

[codecov-commenter]

Codecov Report

Merging #386 (d3f5d16) into master (db4f098) will decrease coverage by 0.00%.
The diff coverage is 33.33%.

❗ Current head d3f5d16 differs from pull request most recent head a149dc4. Consider uploading reports for the commit a149dc4 to get more accurate results

@@            Coverage Diff             @@
##           master     #386      +/-   ##
==========================================
- Coverage   74.94%   74.93%   -0.01%     
==========================================
  Files         146      146              
  Lines       24314    24317       +3     
==========================================
+ Hits        18221    18222       +1     
- Misses       6093     6095       +2     

Impacted Files	Coverage Δ
benchmarks/src/bin/tpch.rs	30.84% <33.33%> (+0.01%)	⬆️

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[Dandandan]

Looks good

[Dandandan]

Windows CI failure is unrelated, was happening in other PRs too.

[alamb]

I restared the windows CI check -- hopefully we'll get a passing run