PY-11552 Keep maximum 1 empty line between declarations and in code by default

Fix affected test data where reformat is invoked during refactoring.
Also use entire sample provided by user in the corresponding test case
for the issue.

python/testData/refactoring/move/class/after/src/c.py

@@ -1,7 +1,6 @@
 from a import main
 from b import C
 
-
 if __name__ == '__main__':
     main()
     c = C()

python/testData/refactoring/move/importFirstWithSlash/after/src/tmp.py

@@ -1,6 +1,5 @@
 from file1 import function_2
 from file2 import function_1
 
-
 function_1()
 function_2()

python/testData/refactoring/move/importSlash/after/src/tmp.py

@@ -1,6 +1,5 @@
 from file1 import function_1
 from file2 import function_2
 
-
 function_1()
 function_2()