Change umf_test-* tests' prefix to test_*

[KFilipek]

Description

Checklist

• Code compiles without errors locally
• All tests pass locally
• CI workflows execute properly

• CI workflows, not executed per PR (e.g. Nightly), execute properly
• New tests added, especially if they will fail without my changes
• Added/extended example(s) to cover this functionality
• Extended the README/documentation
• All newly added source files have a license
• All newly added source files are referenced in CMake files
• Logger (with debug/info/... messages) is used
• All API changes are reflected in docs and def/map files, and are tested

[lplewa]

If we are renaming test names, can we rename them in that way that we use only '-' or '_', not both. I find it really annoying when typing name of the test.

[KFilipek]

If we are renaming test names, can we rename them in that way that we use only '-' or '_', not both. I find it really annoying when typing name of the test.

According to GTest documentation each test should be named using camel-case - it should solve each problem.

[PatKamin]

So with this change we would have umf-test_name tests and umf_example_test_name examples binaries. Do you plan to rename examples in the same way in another PR?

Other, non-blocking, comment - the naming convention of umf tests is just for easy grepping of tests binaries as they are not installed with umf. As they are not-installed-binaries I would prefer a more convenient naming of tests like test-test_name.

[lukaszstolarczuk]

I vote for combining both - Patryk's and Lukasz's proposals: test_<test_bin_name> (fixing test_bin_name's is totally different story)