`write_to_file` should be part of 'Construct input' section

[tyuldashev]

Description In verbose mode lines which create test input files should be part of 'Construct input' section instead of being outside of any section.

To Reproduce Steps to reproduce the behavior:

1. Enable UTBot Verbose Formatting mode
2. Generate tests for code which are using files, for instance use following code (extraction from c-examples/file.c):

int file_fgets(FILE *fA) {
  char a[8];
  fgets(a, 6, fA);
  if (a[0] == 'u' && a[1] == 't' && a[2] == 'b' && a[3] == 'o' && a[4] == 't') {
    return 1;
  }
  return 0;
}

Actual behavior Generated tests start with following code:

TEST(regression, file_fgets_test_1)
{
    write_to_file("../../../tests/src/A", "ut\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n");
    write_to_file("../../../tests/src/B", "\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0");
    write_to_file("../../../tests/src/C", "\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0");

    struct _IO_FILE * fA = (UTBot::FILE *) fopen("../../../tests/src/A", "r");

    // Construct input

    // Expected output
    int expected = 0;
...

Expected behavior File preparation is right below // Construct input comment, so it looks like:

TEST(regression, file_fgets_test_1)
{
    // Construct input

    write_to_file("../../../tests/src/A", "ut\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n""\n");
    write_to_file("../../../tests/src/B", "\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0");
    write_to_file("../../../tests/src/C", "\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0""\0");

    struct _IO_FILE * fA = (UTBot::FILE *) fopen("../../../tests/src/A", "r");

    // Expected output
    int expected = 0;
...