DMD-745 add DirectGrantTable to workspace create/drop

[zajca]

Jira: DMD-745
Connection PR: https://github.com/keboola/connection/pull/6674
SAPI PR: -

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• Create tag
• Create release in read-only repo

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Release Notes

• Add top-level DirectGrantTable protobuf message with repeated string path + string tableName fields
• Add directGrantTables repeated field to both CreateWorkspaceCommand (field 11) and DropWorkspaceCommand (field 5)

Impact analysis

• Backward compatible — new message and new repeated fields default to empty, existing consumers are unaffected
• No runtime impact until driver-bigquery and connection consume the new fields

Change type

• new feature

Justification

• BigQuery direct grant output mapping (DMD-745) requires granting table-level IAM bindings when a workspace is created and revoking them when a workspace is deleted. The driver needs to know which tables should have direct grants. These fields pass that information to CreateWorkspaceHandler and DropWorkspaceHandler.
• DirectGrantTable is a top-level message (not nested) because it is shared between two commands — avoids cross-command type dependency.
• Uses repeated string path + string tableName pattern consistent with all other table-related commands in the codebase (CreateTableCommand, DropTableCommand, PreviewTableCommand, etc.).

[linear]

DMD-745 BigQuery Manual OM support

[jirkasemmler]

@zajca prosim drzme zase nejakou navaznost v reviews - RFC jsi chtel checknout od me/Romana, tak si pojdme rict, ze i ty reviews budeme davat na me/Romana. viz https://keboola.atlassian.net/wiki/spaces/ENGG/pages/404815876/KBC+Team+internal+meeting#:~:text=libi%20se%20nam%20to%2C%20konecne%20budou%20pseudo%2Dfeature%20teams