Add C API bindings for manifest and file size tuning options

[dheerajd5]

Summary

This PR is to fix issue : #14285

• Expose max_manifest_space_amp_pct and target_file_size_is_upper_bound to the C API.

  • rocksdb_options_set_max_manifest_space_amp_pct takes in int
  • rocksdb_options_get_max_manifest_space_amp_pct returns int
  • rocksdb_options_set_target_file_size_is_upper_bound takes in unsigned char
  • rocksdb_options_get_target_file_size_is_upper_bound returns unsigned char

• Allows C API users to have more finer grained control over manifest and SST file sizings.

Test Plan

• Tests are added to c_test , under "options" , to validate getter and setters for the two fields.