issue(spl-perf): Reduce time to execute environmental setup `cheatcode_set_discriminator` and `cheatcode_set_program_id`

[Stevengre]

• Problem: According the image from [MAIN] SPL-Token Proof Status #47, it costs nearly 2000s to finish these two cheatcode.

• Solution: Provide cheat code rule to bypass the execution.

[Stevengre]

• Solved: refactor(spl): use assume to replace cheatcode_set_* #71