PY-34498 Add an inspection for pytest fixture that is not passed to test parameters

Fix incorrect fixtures searching in imports. Add test that inspection registers problem only for PyTestFixture.

GitOrigin-RevId: de029bb401689f0218e6fce04e64e738a8051fae

python/src/com/jetbrains/python/testing/pyTestFixtures/PyTestFixture.kt

@@ -207,8 +207,8 @@ private fun findImportedFixtureInFile(targetFile: PyFile,
   val resolveImportElements = importedFixture?.multiResolve()?.map { it.element }
   if (importedFixture != null) {
     // if fixture is imported as `from module import some_fixture as sf`
-    resolveImportElements?.filterIsInstance<PyFunction>()?.firstOrNull()?.let { fixture ->
-      return NamedFixtureLink(PyTestFixture(func, fixture, fixture.name ?: ""), importedFixture)
+    resolveImportElements?.firstOrNull { (it as? PyFunction)?.isFixture() == true }?.let { fixture ->
+      return (fixture as? PyFunction)?.let {  NamedFixtureLink(PyTestFixture(func, fixture, fixture.name ?: ""), importedFixture) }
     }
 
     resolveImportElements?.let { list ->

python/testData/inspections/PyTestUnpassedFixtureInspection/NoInspectCorrectCode.py

@@ -0,0 +1,6 @@
+import pytest
+from time import time
+
+
+def test_():
+    time.time()

python/testSrc/com/jetbrains/python/testing/PyTestUnpassedFixtureInspectionTest.kt

@@ -51,4 +51,8 @@ class PyTestUnpassedFixtureInspectionTest : PyInspectionTestCase() {
   fun testUnpassedFixtureFromImport() {
     doTest()
   }
+
+  fun testNoInspectCorrectCode() {
+    doTest()
+  }
 }