include test data and add aggregation tests in integration test

[jimexist]

Which issue does this PR close?

Closes#428

Rationale for this change

we'd like to include the test data into psql so that we can test more realistically

What changes are included in this PR?

• add create table and load csv statement in integration run

Are there any user-facing changes?

[codecov-commenter]

Codecov Report

Merging #425 (6028904) into master (321fda4) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@ Coverage Diff @@## master #425 +/- ##
==========================================
- Coverage 75.16% 75.16% -0.01% 
==========================================
Files 150 150 Lines 25144 25145 +1 ==========================================
Hits 18899 18899 - Misses 6245 6246 +1 

Impacted Files	Coverage Δ
datafusion-cli/src/main.rs	0.00% <0.00%> (ø)

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[alamb]

The windows failure is unrelated

error: could not copy file from 'C:\Users\runneradmin\.cargo\bin\rustup-init.exe' to 'C:\Users\runneradmin\.cargo\bin\rustup.exe': The process cannot access the file because it is being used by another process. (os error 32)
ResourceUnavailable: D:\a\_temp\25f719e4-aedd-4bf5-b3e9-d027995ab838.ps1:3
Line |
3 | rustup default stable
| ~~~~~~~~~~~~~~~~~~~~~
| Program 'rustup.exe' failed to run: The specified executable is not a valid application for this OS
| platform.At D:\a\_temp\25f719e4-aedd-4bf5-b3e9-d027995ab838.ps1:3 char:1 + rustup default stable +

[alamb]

Thanks @jimexist -- this looks nice