🧹 Remove redundant snapshot sourceDiskId field

Now that sourceDisk is a typed resource reference, the raw ID string
is unnecessary — callers can traverse sourceDisk.id instead.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: tas50

providers/gcp/resources/compute.go

@@ -1175,7 +1175,6 @@ func (g *mqlGcpProjectComputeService) snapshots() ([]any, error) {
 				"enableConfidentialCompute":      llx.BoolData(snapshot.EnableConfidentialCompute),
 				"satisfiesPzi":                   llx.BoolData(snapshot.SatisfiesPzi),
 				"satisfiesPzs":                   llx.BoolData(snapshot.SatisfiesPzs),
-				"sourceDiskId":                   llx.StringData(snapshot.SourceDiskId),
 				"sourceSnapshotSchedulePolicy":   llx.StringData(snapshot.SourceSnapshotSchedulePolicy),
 				"sourceSnapshotSchedulePolicyId": llx.StringData(snapshot.SourceSnapshotSchedulePolicyId),
 			})

providers/gcp/resources/gcp.lr

@@ -1028,8 +1028,6 @@ private gcp.project.computeService.snapshot @defaults("name") {
   satisfiesPzs bool
   // Source disk used to create this snapshot
   sourceDisk() gcp.project.computeService.disk
-  // ID of the source disk used to create this snapshot
-  sourceDiskId string
   // URL of the snapshot schedule policy that created this snapshot
   sourceSnapshotSchedulePolicy string
   // ID of the snapshot schedule policy

providers/gcp/resources/gcp.lr.go

@@ -1225,7 +1225,6 @@ gcp.project.computeService.snapshot.satisfiesPzi 11.6.6
 gcp.project.computeService.snapshot.satisfiesPzs 11.6.6
 gcp.project.computeService.snapshot.snapshotType 9.0.0
 gcp.project.computeService.snapshot.sourceDisk 11.6.6
-gcp.project.computeService.snapshot.sourceDiskId 13.1.2
 gcp.project.computeService.snapshot.sourceSnapshotSchedulePolicy 13.1.2
 gcp.project.computeService.snapshot.sourceSnapshotSchedulePolicyId 13.1.2
 gcp.project.computeService.snapshot.status 9.0.0