Read, Write, Copy, Rename tests [Readonly Filesystem]

[Tulsishah]

Description

Adding testcase

1. Read
   • ReadFile, ReadSubDirectoryFile
   • ReadDir is covered in list tests
2. Open
   • Open File to Write, append or update data
   • Write, Update, and Compose tests are skipped because we need to open the file first.
3. CopyFile
   • Copy one file to another file
   • Copy one Directory to another dir.
4. Rename
   • Rename file
   • Rename Directory to another dir.

Link to the issue in case of a bug fix.

Testing details

1. Manual - All the tests are passing.
2. Unit tests - N/A
3. Integration tests - All the inetgration tests are passing from integration tests directory