Move coverage and nose2 configs to pyproject.toml

(Redmine issue: #7826)

.coveragerc

-[run]
-source = ./lib

nose2.cfg

-[unittest]
-plugins = nose2.plugins.junitxml
-start-dir = lib
-test-file-pattern=*.py

pyproject.toml

@@ -130,3 +130,13 @@ format_css = true
 [tool.djlint.per-file-ignores]
 ".*\\.(txt|idea)\\.j2" = "H025"
 "_macros_site.html" = "H025,T001"
+
+
+[tool.nose2.unittest]
+plugins = "nose2.plugins.junitxml"
+start-dir = "lib"
+test-file-pattern = "*.py"
+
+
+[tool.coverage.run]
+source = ["./lib"]