Consolidate test framework syntax usage

[fairlight1337]

Describe the bug
The tests written for the project are using different types of syntax:

TEST_CASE("Test description", "ComponentUnderTest") {
  // Test code
}

vs.

TEST_CASE("test_description", "ComponentUnderTest") {
  // Test code
}

vs.

TEST_CASE("ComponentUnderTest") {
  SECTION("Test description") {
    // Test code
  }
}

vs.

TEST_CASE("ComponentUnderTest") {
  SECTION("test_description") {
    // Test code
  }
}

This is very confusing and a common guideline is difficult to pin down.

To Reproduce
Look at the .cpp test files in tests/.

Expected behavior
All of the tests should have this format:

TEST_CASE("ComponentUnderTest") {
  SECTION("Test description") {
    // Test code
  }
}