Fix \r and \r\n handling in t- and f-string debug texts (#18673)

crates/ruff_python_formatter/resources/test/fixtures/ruff/.editorconfig

@@ -8,4 +8,8 @@ ij_formatter_enabled = false
 
 [docstring_tab_indentation.py]
 generated_code = true
-ij_formatter_enabled = false
+ij_formatter_enabled = false
+
+[f-string-carriage-return-newline.py]
+generated_code = true
+ij_formatter_enabled = false

crates/ruff_python_formatter/resources/test/fixtures/ruff/f-string-carriage-return-newline.py

@@ -0,0 +1,8 @@
+# Regression test for https://github.com/astral-sh/ruff/issues/18667
+f"{
+1=
+}"
+
+t"{
+1=
+}"