chore: use static params when dynamic param metadata is missing (#17836)

Existing template versions do not have the metadata (modules + plan) in
the db. So revert to using static parameter information from the
original template import.

This data will still be served over the websocket.

coderd/parameters_internal_test.go

@@ -1,77 +0,0 @@
-package coderd
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/require"
-
-	"github.com/coder/coder/v2/coderd/database"
-)
-
-func Test_parameterProvisionerVersionDiagnostic(t *testing.T) {
-	t.Parallel()
-
-	testCases := []struct {
-		version string
-		warning bool
-	}{
-		{
-			version: "",
-			warning: true,
-		},
-		{
-			version: "invalid",
-			warning: true,
-		},
-		{
-			version: "0.4",
-			warning: true,
-		},
-		{
-			version: "0.5",
-			warning: true,
-		},
-		{
-			version: "0.6",
-			warning: true,
-		},
-		{
-			version: "1.4",
-			warning: true,
-		},
-		{
-			version: "1.5",
-			warning: false,
-		},
-		{
-			version: "1.6",
-			warning: false,
-		},
-		{
-			version: "2.0",
-			warning: false,
-		},
-		{
-			version: "2.5",
-			warning: false,
-		},
-		{
-			version: "2.6",
-			warning: false,
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run("Version_"+tc.version, func(t *testing.T) {
-			t.Parallel()
-			diags := parameterProvisionerVersionDiagnostic(database.TemplateVersionTerraformValue{
-				ProvisionerdVersion: tc.version,
-			})
-			if tc.warning {
-				require.Len(t, diags, 1, "expected warning")
-			} else {
-				require.Len(t, diags, 0, "expected no warning")
-			}
-		})
-	}
-}