[Bug]: test-iceberg-e2e-local fails because the nested adapter module is not tidy

### MatrixOne commit

`d57f99abc0b9756e07aeb09ba642471db8c40ad7`

### What happened

The repository-provided local Iceberg E2E gate cannot reach the Docker or SQL test stages on the latest `main` because the nested Iceberg adapter module is not tidy.

### Reproduction

```bash
env -u GOROOT make test-iceberg-e2e-local
```

The gate stops at:

```text
[iceberg-ci] go test -tags iceberggo -count=1 ./...
go: updates to go.mod needed; to update it:
go mod tidy
make: *** [test-iceberg-e2e-local] Error 1
```

The failing command is run in `pkg/iceberg/adapter/iceberggo`, which has its own `go.mod` and `go.sum`.

### Root-cause evidence

Running the non-mutating diagnostic below in the nested module:

```bash
env -u GOROOT go mod tidy -diff
```

reports required changes, including:

- add indirect `github.com/BurntSushi/toml v1.2.1`
- update `github.com/klauspost/compress` from `v1.18.4` to `v1.18.7`
- update `github.com/pierrec/lz4/v4` from `v4.1.25` to `v4.1.26`
- update several `golang.org/x/*` indirect dependencies
- remove stale indirect dependencies and checksums

The root dependency upgrades were introduced by #27531, while the independent adapter module was not updated with them.

After temporarily running `go mod tidy` in the nested module, the same adapter test invoked by the gate passes under the E2E script's CGO environment:

```text
ok github.com/matrixorigin/matrixone/pkg/iceberg/adapter/iceberggo 0.453s
```

### Expected behavior

`make test-iceberg-e2e-local` should pass its adapter dependency preflight on a clean checkout and continue to the Nessie/MinIO/MatrixOne E2E stages without modifying tracked module files.

### Actual behavior

The official E2E target fails deterministically at the nested adapter module dependency check before any Iceberg SQL E2E case runs.