chore: add bats test runner to run tests

Add the extension kherring.bats-test-runner to run bats tests using the test explorer. This makes the CMake "work-around", using cmake-bats, redundent and as such this is removed. This change homogenizes runner of tests across all containers.

Author: rjaegers

.devcontainer/cpp/devcontainer.json

@@ -31,6 +31,7 @@
         "[email protected]",
         "[email protected]",
         "[email protected]",
+        "[email protected]",
         "[email protected]",
         "[email protected]",
         "[email protected]",

.devcontainer/rust/devcontainer.json

@@ -18,6 +18,7 @@
         "[email protected]",
         "[email protected]",
         "[email protected]",
+        "[email protected]",
         "[email protected]",
         "[email protected]",
         "[email protected]",