Add ratified Zcmop extension

[ved-rivos]

Description

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Add support for Zcmop extension

Related Issues

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Ratified/Unratified Extensions

• Ratified
• [] Unratified

List Extensions

List the extensions that your PR affects. In case of unratified extensions, please provide a link to the spec draft that was referred to make this PR.

https://github.com/riscv/riscv-isa-manual/blob/main/src/zimop.adoc

Reference Model Used

• [X ] SAIL
• Spike
• Other - < SPECIFY HERE >

Mandatory Checklist:

• [X ] All tests are compliant with the test-format spec present in this repo ?
• [ X] 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): < SPECIFY HERE >
• Link to PR in RISCV-ISAC from which the reports were generated : < SPECIFY HERE >
• [ X] Changelog entry created with a minor patch

Optional Checklist:

• [X ] RISCV-V CTG PR link if tests were generated using it : < SPECIFY HERE >
• 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.

[allenjbaum]

This needs the coverage model, as the checklist says:

• Ran the new tests on RISCOF in coverage mode
• Link to Google-Drive folder containing the new coverage reports (See this for more info): < SPECIFY HERE >

[UmerShahidengr]

Merging this one, will resolve the version issue in a separate short PR