chore(deps): update terraform googlecloudplatform/sql-db/google to v26

This MR contains the following updates:

Package	Type	Update	Change
GoogleCloudPlatform/sql-db/google (source)	module	major	~> 25.0 -> ~> 26.0

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Release Notes

terraform-google-modules/terraform-google-sql-db (GoogleCloudPlatform/sql-db/google)

v26.2.1

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Bug Fixes

• add retain_backups_on_delete to mssql submodule (#​764) (a074efc)
• removed enum validation from fields where only single value is available (#​770) (2b823b3)

v26.2.0

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Features

• deps: Update Terraform Google Provider to v7 (major) (#​767) (3eb4c96)
• Output the Service Attachment links for Replicas (#​758) (e5446b7)
• per module requirements (#​749) (0475973)

Bug Fixes

• Addng UI validations for MySql and PostgreSQL (#​759) (0b75726)
• correct typos in README and variables.tf descriptions (#​753) (1615d75)
• rename app hub service id (#​757) (e9a7830)
• revert psc_config workaround - causes permanent drift (#​754) (3cb3eee)
• use local.zone fallback for replica region calculation (#​760) (4eb9309)

v26.1.1

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Bug Fixes

• adding regex validation for ip network and changing description for variables (#​747) (d4b8db7)

v26.1.0

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Features

• Add optional kms_key_handle_name (#​743) (19c3b84)

v26.0.0

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⚠️ BREAKING CHANGES

• TPG>6.31: Support retain_backups_on_delete for mysql, safer_mysql (#​735)
• TPG>6.17: Adding new variables to define failover dr replica (#​728)

Features

• Add output to retrieve passwords by user name for additional_users (#​719) (bca69c4)
• add setting enable_dataplex_integration (#​713) (f5ad3e6)
• Add support for autokey in postgres module (#​712) (db53c26)
• add support for server_ca_mode and custom SANs (#​714) (#​736) (15e8be8)
• Remove condition from data.google_compute_zones.available (#​684) (af7f20c)
• Support retain_backups_on_delete for postgres (#​737) (eb9b52f)
• TPG>6.17: Adding new variables to define failover dr replica (#​728) (90a3e64)
• TPG>6.31: Support retain_backups_on_delete for mysql, safer_mysql (#​735) (d0b31dd)

Bug Fixes

• Disable SQL instance data_cache when data_cache_enabled variable is false (#​720) (7befe54)
• Postgres read-replica "psc_enabled" permadiff (923b770)
• replace invalid optional(string, ) with optional(string) (#​725) (056e436)
• truncate service account display_name in backup module (#​734) (edc7ee7)

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