chore(deps): update module cloud.google.com/go/secretmanager to v1.18.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cloud.google.com/go/secretmanager	v1.16.0 → v1.18.0

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[renovate]

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 22 additional dependencies were updated
• The go directive was updated for compatibility reasons

Details:

Package	Change
go	1.24.10 -> 1.25.0
google.golang.org/api	v0.258.0 -> v0.274.0
google.golang.org/grpc	v1.79.3 -> v1.80.0
cloud.google.com/go/auth	v0.17.0 -> v0.18.2
cloud.google.com/go/iam	v1.5.2 -> v1.7.0
github.com/googleapis/enterprise-certificate-proxy	v0.3.7 -> v0.3.14
github.com/googleapis/gax-go/v2	v2.15.0 -> v2.21.0
go.opentelemetry.io/otel	v1.39.0 -> v1.42.0
go.opentelemetry.io/otel/metric	v1.39.0 -> v1.42.0
go.opentelemetry.io/otel/trace	v1.39.0 -> v1.42.0
golang.org/x/crypto	v0.47.0 -> v0.49.0
golang.org/x/mod	v0.31.0 -> v0.33.0
golang.org/x/net	v0.49.0 -> v0.52.0
golang.org/x/oauth2	v0.34.0 -> v0.36.0
golang.org/x/sync	v0.19.0 -> v0.20.0
golang.org/x/sys	v0.40.0 -> v0.42.0
golang.org/x/term	v0.39.0 -> v0.41.0
golang.org/x/text	v0.33.0 -> v0.35.0
golang.org/x/time	v0.14.0 -> v0.15.0
golang.org/x/tools	v0.40.0 -> v0.42.0
google.golang.org/genproto	v0.0.0-20250603155806-513f23925822 -> v0.0.0-20260319201613-d00831a3d3e7
google.golang.org/genproto/googleapis/api	v0.0.0-20251202230838-ff82c1b0f217 -> v0.0.0-20260401024825-9d38bb4040a9
google.golang.org/genproto/googleapis/rpc	v0.0.0-20251213004720-97cd9d5aeac2 -> v0.0.0-20260401001100-f93e5f3e9f0f