feat: Add ReadOnlyPartitionError message

[joannalauu]

Summary

[Brief summary of the change, including the rationale and intended effect]

Type of Change

• Add new API(s)
• Add new data type(s)
• Add new field(s) to existing data type
• Remove field(s) from data type
• Remove data type(s)
• Remove API(s)
• Other (please provide detailed description)

Data Effect

• Does it change the data stored in database?

Detailed Description

Add new ReadOnlyPartitionError message

Part of: cadence #7560

Impact Analysis

• Backward Compatibility: Yes, no conflict with existing errors and client expectations
• Forward Compatibility: Yes

Testing Plan

• Unit Tests: N/A
• Persistence Tests: N/A
• Integration Tests: N/A
• Compatibility Tests: N/A

Rollout Plan

• What is the rollout plan? Pull into cadence repo, then update mappers
• Does the order of deployment matter?
• Is it safe to rollback? Does the order of rollback matter?
• Is there a kill switch to mitigate the impact immediately?