[TC] [CBREST] Panic in ExecuteWithContext() when request fails

	payload, err := retryer.DoWithContext(

		ctx,

		func(ctx *retry.Context) (any, error) { return c.do(ctx, request) }, //nolint:bodyclose

	)

	resp := payload.(*http.Response)

app: cp-fm-gateway

caller: middleware/recovery.go:30

env: prod

error: interface conversion: interface {} is nil, not *http.Response

level: error

logger: /cp-fm-gateway

msg: recovered from panic while responding to a http request

requestId: stacktrace

github.com/couchbasecloud/couchbase-cloud/cmd/cp-fm-gateway/server.(*FleetManager).Start.Recovery.func5.1.1

    internal/middleware/recovery.go:30

runtime.gopanic

    GOROOT/src/runtime/panic.go:914

runtime.panicdottypeE

    GOROOT/src/runtime/iface.go:263

github.com/couchbase/tools-common/couchbase/rest.(*Client).Do

    external/com_github_couchbase_tools_common_couchbase/rest/client.go:684

github.com/couchbase/tools-common/couchbase/rest.(*Client).ExecuteWithContext

    external/com_github_couchbase_tools_common_couchbase/rest/client.go:509

github.com/couchbasecloud/couchbase-cloud/internal/fleetmanager/clusters.(*IndexService).getIndexStatuses

    internal/fleetmanager/clusters/indexes.go:456

github.com/couchbasecloud/couchbase-cloud/internal/fleetmanager/clusters.(*IndexService).GetClustersIndexes

    internal/fleetmanager/clusters/indexes.go:355

github.com/couchbasecloud/couchbase-cloud/cmd/cp-fm-gateway/server.(*FleetManager).registerEndpoints.(*IndexesManager).GetClustersIndexes.func28

    cmd/cp-fm-gateway/clusters/indexes.go:211

github.com/couchbasecloud/couchbase-cloud/cmd/cp-api/v2.(*Endpoint).ServeHTTP

    cmd/cp-api/v2/endpoint.go:16

github.com/couchbasecloud/couchbase-cloud/cmd/cp-fm-gateway/server.(*JWTMiddleware).Middleware-fm.(*JWTMiddleware).Middleware.func1

    cmd/cp-fm-gateway/server/middleware.go:84

net/http.HandlerFunc.ServeHTTP

    GOROOT/src/net/http/server.go:2136

github.com/couchbasecloud/couchbase-cloud/cmd/cp-fm-gateway/server.(*FleetManager).Start.Recovery.func5.1

    internal/middleware/recovery.go:48

net/http.HandlerFunc.ServeHTTP

    GOROOT/src/net/http/server.go:2136

github.com/gorilla/mux.(*Router).ServeHTTP

    external/com_github_gorilla_mux/mux.go:210

net/http.serverHandler.ServeHTTP

    GOROOT/src/net/http/server.go:2938

net/http.(*conn).serve

    GOROOT/src/net/http/server.go:2009

ts: 1698995839922.7468