chore(deps): update terraform oci to v8.21.0

[dependencysherpa]

This PR contains the following updates:

Package	Type	Update	Change
oci (source)	required_provider	minor	8.20.0 → 8.21.0

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Release Notes

oracle/terraform-provider-oci (oci)

v8.21.0

Compare Source

Added

• Support for Generative AI project resource and memory config updates
• Support for CCP Windows Alloy BYOL project
• Support for Sending a tags-only update can still send compute-node scale intent.
• Support initial jitter for Data Science schedules
• Support for Point in Time Recovery (PITR) for PSQL.
• Support for Object Storage Bucket Encryption Keys (UI & API)
• Support for SKE: Virtual Node Pool Cycling

Bug Fix

• Reconcile replica KMS key state for block volume replicas
• Fix Unable to set sysvar_binlog_row_value_options to empty string

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