[ZkTracer] Add several blake test cases

[lorenzogentile404]

This PR implements issue(s) #

Checklist

• I wrote new tests for my new core changes.
• I have successfully ran tests, style checker and build against my new changes locally.
• If this change is deployed to any environment (including Devnet), E2E test coverage exists or is included in this
  PR.
• I have informed the team of any breaking changes if there are any.

---

Note

Low Risk
Low risk: changes are confined to the RISC-V example/test harness (Makefile/docs) and add/commit test fixtures, with no impact on production runtime code.

Overview
Adds a new make blake-all target in arithmetization/src/test/examples/Makefile to iterate over input vectors from rust/src/blake/blake.all and run blake_with_in_bytes.rs for each case.

Updates the examples README.md accordingly (including the shell alias rename to riscv-test) and commits a large set of generated single-opcode RV64IM assembly test programs under asm/src/op/ by removing the previous ignore rule; the old opcode-test generation/runner scripts under asm/scripts/ are deleted.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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