Revert case insensitive changes

[moxplod]

Description

This is to revert the changes to non-EF LINQ compliant code.

Fixes # #203

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have performed a self-review of my code
• I have added tests that prove my fix is effective or that my feature works
• I have made corresponding changes to the documentation
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes

[what-the-diff]

PR Summary

• Update to 'BaseQueryBuilder' and 'LinqQueryBuilder'
  The principle alterations to these files in the Gridify/Builder directory involved the addition of a new isNested parameter to the BuildQuery method; aiding in more complexity while executing queries.

• Enhancements to String Comparisons
  The LinqQueryBuilder had several adjustments made mainly around string comparisons. Case sensitivity was removed from the Equal and NotEqual operations, and case-insensitive handling was incorporated for the Like and NotLike operations. Additional support was also added for the StartsWith, NotStartsWith, EndsWith, and NotEndsWith operators, thus improving the flexibility of string comparisons.

• Simplification of Methods within 'MethodInfoHelper'
  In the MethodInfoHelper.cs file located in the src/Gridify/Reflection directory, several methods were removed for simplicity. A new GetToLowerMethod was added to get the ToLower method of string type, providing a streamline operation to change strings to lower case.

• Test file and adjustments
  There was a deletion of the Issue193Tests.cs file in the test/EntityFrameworkPostgreSqlIntegrationTests directory. A test called ApplyFiltering_GreaterThanOrEqual_CaseInsensitive_BetweenTwoStrings in the GridifyExtensionsShould.cs file has been modified to use StringComparison.OrdinalIgnoreCase, therefore improving test coverage and accuracy.

[moxplod]

If we take these changes we will have to reopen issue #193

[moxplod]

Just added these tests commented here to uncomment later when we fix #193

[alirezanet]

Thanks 💐