TST: Match dta format used for Stata test files with that implied by their filenames
- [x] closes #57693
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

A few of the Stata test data files were not saved in the format implied by their file names. As these are binary files they are harder to compare, so I have included Stata output detailing their contents below:

[dtatests_original.txt](https://github.com/pandas-dev/pandas/files/14918526/dtatests_original.txt)

[dtatests_updated.txt](https://github.com/pandas-dev/pandas/files/14918527/dtatests_updated.txt)

The Stata tests already include files in the formats that these were actually saved as, so converting them shouldn't lose any coverage.

After making the change I ran the following Stata script in the test directory, confirming that all the files now match their expected version:

```
local files : dir "." files "*.dta"
foreach file in `files' {
  dtaversion `file'
}
```
```
  (file "s4_educ1.dta" is .dta-format 105 from Stata 5)
  (file "stata-compat-105.dta" is .dta-format 105 from Stata 5)
  (file "stata-compat-108.dta" is .dta-format 108 from Stata 6)
  (file "stata-compat-111.dta" is .dta-format 111 from Stata 7)
  (file "stata-compat-113.dta" is .dta-format 113 from Stata 8 or 9)
  (file "stata-compat-114.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata-compat-118.dta" is .dta-format 118 from Stata 14, 15, 16, 17, or 18)
  (file "stata-dta-partially-labeled.dta" is .dta-format 118 from Stata 14, 15, 16, 17, or 18)
  (file "stata10_115.dta" is .dta-format 115 from Stata 12)
  (file "stata10_117.dta" is .dta-format 117 from Stata 13)
  (file "stata11_115.dta" is .dta-format 115 from Stata 12)
  (file "stata11_117.dta" is .dta-format 117 from Stata 13)
  (file "stata12_117.dta" is .dta-format 117 from Stata 13)
  (file "stata13_dates.dta" is .dta-format 117 from Stata 13)
  (file "stata14_118.dta" is .dta-format 118 from Stata 14, 15, 16, 17, or 18)
  (file "stata15.dta" is .dta-format 118 from Stata 14, 15, 16, 17, or 18)
  (file "stata16_118.dta" is .dta-format 118 from Stata 14, 15, 16, 17, or 18)
  (file "stata1_114.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata1_117.dta" is .dta-format 117 from Stata 13)
  (file "stata1_encoding.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata1_encoding_118.dta" is .dta-format 118 from Stata 14, 15, 16, 17, or 18)
  (file "stata2_113.dta" is .dta-format 113 from Stata 8 or 9)
  (file "stata2_114.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata2_115.dta" is .dta-format 115 from Stata 12)
  (file "stata2_117.dta" is .dta-format 117 from Stata 13)
  (file "stata3_113.dta" is .dta-format 113 from Stata 8 or 9)
  (file "stata3_114.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata3_115.dta" is .dta-format 115 from Stata 12)
  (file "stata3_117.dta" is .dta-format 117 from Stata 13)
  (file "stata4_113.dta" is .dta-format 113 from Stata 8 or 9)
  (file "stata4_114.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata4_115.dta" is .dta-format 115 from Stata 12)
  (file "stata4_117.dta" is .dta-format 117 from Stata 13)
  (file "stata5_113.dta" is .dta-format 113 from Stata 8 or 9)
  (file "stata5_114.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata5_115.dta" is .dta-format 115 from Stata 12)
  (file "stata5_117.dta" is .dta-format 117 from Stata 13)
  (file "stata6_113.dta" is .dta-format 113 from Stata 8 or 9)
  (file "stata6_114.dta" is .dta-format 114 from Stata 10 or 11)
  (file "stata6_115.dta" is .dta-format 115 from Stata 12)
  (file "stata6_117.dta" is .dta-format 117 from Stata 13)
  (file "stata7_111.dta" is .dta-format 111 from Stata 7)
  (file "stata7_115.dta" is .dta-format 115 from Stata 12)
  (file "stata7_117.dta" is .dta-format 117 from Stata 13)
  (file "stata8_113.dta" is .dta-format 113 from Stata 8 or 9)
  (file "stata8_115.dta" is .dta-format 115 from Stata 12)
  (file "stata8_117.dta" is .dta-format 117 from Stata 13)
  (file "stata9_115.dta" is .dta-format 115 from Stata 12)
  (file "stata9_117.dta" is .dta-format 117 from Stata 13)
```

Thanks @cmjcharlton 