Shorten the generated code with ./release-rs.sh --features short

[byeongkeunahn]

The newly introduced short feature enables the following during build to generate shorter outputs:

• Omit platform-abstraction layer (PAL) routines for Windows, assuming a Linux environment
• Omit system calls that increase the stack size to 256M or more when running natively (this prevents segmentation faults due to stack overflow in local testing environments, but not needed in online judges)
• Omit support for running natively without loader, in the entrypoint routine (_start)
• Use dedicated target.json to disable stack probes and read-only relocations (RELRO)
• Use potentially slower but massively shorter I/O routines
• Use shorter, minified template
• Try embedding the code without compression and choose it if it is shorter (the zeros in the binary are abridged using a rudimentary run-length encoding)
• Support for 156KB/0ms with C/C++: the thunk freeing off the .text section to reduce memory usage is adapted for the base91 setting

The following improvements benefit the generated code with or without the short feature enabled:

• Simplify the dynamic relocation stub to generate a shorter machine code
• Simplify the I/O routine
• Do not pass unnecessary zeros to system calls
• Streamline the DYNAMIC section of the generated ELF executable by removing all entries except mandatory ones related to dynamic relocation

[byeongkeunahn]

The Windows CI build failure is due to a recent PR in the rust compiler. The issue was reported and subsequently fixed which is now merged in the latest nightly. The failed jobs will succeed if run again.