[python] requirements.txt: check entries regardless of dash/underscore in the package name (PY-65403, PY-70173)

Since pip [normalizes](https://github.com/pypa/packaging-problems/issues/230) underscores to dashes, PyCharm should treat them equally for requirements.txt entries

GitOrigin-RevId: 62149b9c64c67936f1405c7bf282a288e8d52764

python/python-psi-impl/src/com/jetbrains/python/packaging/PyRequirementImpl.kt

@@ -25,7 +25,7 @@ data class PyRequirementImpl(private val name: String,
 
   override fun match(packages: Collection<PyPackage>): PyPackage? {
     return packages.firstOrNull { `package` ->
-      name.equals(`package`.name, true)
+      name.replace('_', '-').equals(`package`.name.replace('_', '-'), true)
       && versionSpecs.all { it.matches(`package`.version) }
     }
   }