Fix An incorrect file path is read when initiating the test

[linycken013127]

Why need this change? / Root cause:

• In the past, when acquiring Migrations files, the wrong path would be captured during testing, forcing the acquisition of the migrations folder based on the current directory structure.

Changes made:

• Used strings.SplitAfter() to obtain the location of the Backend folder.

Test Scope / Change impact:

• Starting the backend service and running integration tests.

Issue:

None