Improve test coverage reporting / accuracy (#7819)

* improve test coverage reporting / accuracy

* handle absolute coverpaths

* move tests into multiple files

* rename codecov.yml (https://github.com/codecov/support/issues/426)

Makefile

@@ -318,18 +318,18 @@ do-cover-file:
 test-te: do-cover-file
 	@echo Testing TE
 	@echo "Packages to test: "$(TE_PACKAGES)
-	find . -name 'cprofile.out' -exec sh -c 'rm "{}"' \;
+	find . -name 'cprofile*.out' -exec sh -c 'rm "{}"' \;
 	$(GO) test $(GOFLAGS) -run=$(TESTS) $(TESTFLAGS) -v -timeout=2000s -covermode=count -coverpkg=$(ALL_PACKAGES_COMMA) -exec $(ROOT)/scripts/test-xprog.sh $(TE_PACKAGES)
-	find . -name 'cprofile.out' -exec sh -c 'tail -n +2 {} >> cover.out ; rm "{}"' \;
+	find . -name 'cprofile*.out' -exec sh -c 'tail -n +2 {} >> cover.out ; rm "{}"' \;
 
 test-ee: do-cover-file
 	@echo Testing EE
 
 ifeq ($(BUILD_ENTERPRISE_READY),true)
 	@echo "Packages to test: "$(EE_PACKAGES)
-	find . -name 'cprofile.out' -exec sh -c 'rm "{}"' \;
+	find . -name 'cprofile*.out' -exec sh -c 'rm "{}"' \;
 	$(GO) test $(GOFLAGS) -run=$(TESTS) $(TESTFLAGSEE) -p 1 -v -timeout=2000s -covermode=count -coverpkg=$(ALL_PACKAGES_COMMA) -exec $(ROOT)/scripts/test-xprog.sh $(EE_PACKAGES)
-	find . -name 'cprofile.out' -exec sh -c 'tail -n +2 {} >> cover.out ; rm "{}"' \;
+	find . -name 'cprofile*.out' -exec sh -c 'tail -n +2 {} >> cover.out ; rm "{}"' \;
 	rm -f config/*.crt
 	rm -f config/*.key
 endif