[SNOW-1156046] fix toctou vulnerability in EasyLogginConfig

[sfc-gh-erojaslizano]

Description

Invert the order, first read the file and then check the permissions.

Checklist

• [x] Code compiles correctly
• [x] Code is formatted according to Coding Conventions
• [x] Created tests which fail without the change (if possible)
• [x] All tests passing (dotnet test)
• [x] Extended the README / documentation, if necessary
• [x] Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.77419% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 84.75%. Comparing base (abb5c4a) to head (dc4f5b0).

:exclamation: Current head dc4f5b0 differs from pull request most recent head 9a2925b

Please upload reports for the commit 9a2925b to get more accurate results.

Files	Patch %	Lines
...lake.Data/Configuration/EasyLoggingConfigParser.cs	96.15%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #925 +/- ## ========================================== + Coverage 84.74% 84.75% +0.01% ========================================== Files 89 89 Lines 9709 9717 +8 Branches 921 920 -1 ========================================== + Hits 8228 8236 +8 Misses 1253 1253 Partials 228 228 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[sfc-gh-erojaslizano]

I have read the CLA Document and I hereby sign the CLA