Update RV64I sra test cases

[trdthg]

Description

The sra testcases were very old with a covarage of 98.20% (109/111), this patch
regenerate the cases with riscv_ctg (without -r), making covarage to 100%.

Related Issues

Please list all the issues related to this PR. Use NA if no issues exist

Ratified/Unratified Extensions

• Ratified
• Unratified

Reference Model Used

• SAIL
• Spike
• Other - < SPECIFY HERE >

Mandatory Checklist:

• All tests are compliant with the test-format spec present in this repo ?
• Ran the new tests on RISCOF with SAIL/Spike as reference model successfully ?
• Ran the new tests on RISCOF in coverage mode
• Link to Google-Drive folder containing the new coverage reports (See this for more info): < https://drive.google.com/drive/folders/1xx5MUVVFR44-QyF1k08TD3k0CeZZXgNI >

Optional Checklist:

• Were the tests hand-written/modified ?
• Have you run these on any hard DUT model ? Please specify name and provide link if possible in the description
• If you have modified arch_test.h Please provide a detailed description of the changes in the Description section above.