[R-pkg-team] Bug#1116317: r-cran-geoknife: autopkgtest network timeout, mostly on arm64

[Rebecca N. Palmer]

Package: r-cran-geoknife
Version: 1.6.11+dfsg-1

The autopkgtest is randomly failing with a connection timeout:

  ── Error ('test-whisker_templating.R:18:3'): basic XML creation works 
──────────
119s <curl_error_operation_timedout/curl_error/error/condition>
119s Error in `curl::curl_fetch_memory(url, handle = handle)`: Timeout 
was reached [waterdata.usgs.gov]: Connection timed out after 10002 
milliseconds
(and 4 more, all on the same domain)

This mostly happens on arm64 (7 failures out of the 10 runs with logs; 
most of these runs (both failed and passed) were on ci-worker-arm64-07), 
and sometimes on ppc64el and s390x, but never (within the time period 
with logs available) on amd64, armhf, armel, i386, riscv64.

This test is not actually declared as needs-internet, so it might be 
being assigned to runners that are known to have limited network access. 
  Obvious (untested) potential fixes are to declare it as such and/or 
increase the timeout.

(If #1084106 is an implicit proposal to remove this package, we might 
want to decide whether to do that before spending more time on this.)