runtime: Add getExpectedHostDetails for riscv64

Add `getExpectedHostDetails` with expected value according to template
defined in `kata-check_data_riscv64_test.go`. This provides necessary
`HostInfo` for tests to cover `kata-check_riscv64.go`.

Signed-off-by: Yuting Nie <nieyuting@iscas.ac.cn>

src/runtime/cmd/kata-runtime/kata-env_riscv64_test.go

@@ -0,0 +1,13 @@
+// Copyright (c) 2025 Institute of Software, CAS.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package main
+
+func getExpectedHostDetails(tmpdir string) (HostInfo, error) {
+	expectedVendor := "0x0"
+	expectedModel := "0x0"
+	expectedVMContainerCapable := true
+	return genericGetExpectedHostDetails(tmpdir, expectedVendor, expectedModel, expectedVMContainerCapable)
+}