chore: Update make targets for tests with coverage

- Add: Make targets to run test categories with code coverage
  measurement and report.
- Change: Rename make target for running all tests with code coverage
  measurement and report.
- Change: Update use of these make targets in GitHub workflows.

.github/workflows/coverage.yml

@@ -30,7 +30,7 @@ jobs:
         run: make dev
 
       - name: Run the tests and produce the .coverage file
-        run: make test-cov
+        run: make test-all-cov
 
       - name: Coverage comment
         id: coverage_comment

Makefile

@@ -110,8 +110,14 @@ test test-all:
 	$(pytest) $($@)
 
 test-cov:
+	$(pytest) --cov --cov-append --cov-report=term --cov-report=html $(test)
+
+test-all-cov:
 	$(pytest) --cov --cov-report=term --cov-report=html $(test-all)
 
+test-%-cov:
+	$(pytest) --cov --cov-append --cov-report=term --cov-report=html $(test-$*)
+
 
 # Building the Docs