Test for nfs-home not nfs-tmp

[yarikoptic]

Here is the details I was to submit against git-annex, but I think the change was "intended" and most likely it is not worth striving to support NFS-mounted TMPDIR.

details I was going to post against git-annex

### Please describe the problem. Mentioned that "linux build" on https://github.com/datalad/git-annex/ is red. Looking inside a [sample run log](https://github.com/datalad/git-annex/runs/4029945729?check_suite_focus=true) ``` crypto: FAIL Exception: /tmp/nfsmount/gpgtmpvv9ZBy/2/.nfs0000000000103f760000001e: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeLink: resource busy (Device or resource busy) ``` and it seems to be a regression since it seems flipped recently: ``` (git)smaug:/mnt/datasets/datalad/ci/git-annex[master]builds/2021 $> ls -ld 10/cron-*/build-ubuntu.yaml-*/4_test-annex\ \(nfs-tmp\).txt ... -rw-r--r-- 1 datalad datalad 132371 Oct 11 00:55 10/cron-20211011/build-ubuntu.yaml-445-5b6a6bff-success/4_test-annex\ (nfs-tmp).txt -rw-r--r-- 1 datalad datalad 132100 Oct 12 00:55 10/cron-20211012/build-ubuntu.yaml-447-5b6a6bff-success/4_test-annex\ (nfs-tmp).txt -rw-r--r-- 1 datalad datalad 134683 Oct 13 00:55 10/cron-20211013/build-ubuntu.yaml-448-5b6a6bff-failed/4_test-annex\ (nfs-tmp).txt -rw-r--r-- 1 datalad datalad 134663 Oct 14 00:55 10/cron-20211014/build-ubuntu.yaml-449-5b6a6bff-failed/4_test-annex\ (nfs-tmp).txt $> grep 'Device or resource busy' 10/cron-202110{12,13}/build-ubuntu.yaml-*/4_test-annex\ \(nfs-tmp\).txt 10/cron-20211013/build-ubuntu.yaml-448-5b6a6bff-failed/4_test-annex (nfs-tmp).txt:2021-10-13T02:57:06.1081181Z Exception: /tmp/nfsmount/gpgtmpI0oml8/2/.nfs0000000000085f1900000006: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeLink: resource busy (Device or resource busy) 10/cron-20211013/build-ubuntu.yaml-448-5b6a6bff-failed/4_test-annex (nfs-tmp).txt:2021-10-13T02:58:19.5420384Z Exception: /tmp/nfsmount/gpgtmp8aENK4/2/.nfs0000000000085f230000000f: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeLink: resource busy (Device or resource busy) 10/cron-20211013/build-ubuntu.yaml-448-5b6a6bff-failed/4_test-annex (nfs-tmp).txt:2021-10-13T02:59:28.0135977Z Exception: /tmp/nfsmount/gpgtmpgKRtz5/2/.nfs0000000000085f2b00000016: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeLink: resource busy (Device or resource busy) ``` here are the versions of annex ``` $> grep 'name: .*8.2021' 10/cron-202110{12,13}/build-ubuntu.yaml-*/4_test-annex\ \(nfs-tmp\).txt 10/cron-20211012/build-ubuntu.yaml-447-5b6a6bff-success/4_test-annex (nfs-tmp).txt:2021-10-12T02:54:36.8888788Z name: git-annex-debianstandalone-packages_8.20211011+git8-gb7d5d54b0_amd64 10/cron-20211013/build-ubuntu.yaml-448-5b6a6bff-failed/4_test-annex (nfs-tmp).txt:2021-10-13T02:54:40.5415602Z name: git-annex-debianstandalone-packages_8.20211011+git11-g3b5ac2d0d_amd64 ``` so relates to: ``` $> git diff b7d5d54b0..3b5ac2d0d | head -n12 diff --git a/CHANGELOG b/CHANGELOG index c9202beb2..a4ff6fb61 100644 --- a/CHANGELOG +++ b/CHANGELOG * Negotiate P2P protocol version with tor remotes, allowing use of protocol version 1. This negotiation is not supported by versions of git-annex older than 6.20180312. + * test: Put gpg temp home directory in system temp directory, + not filesystem being tested. -- Joey Hess Mon, 11 Oct 2021 14:09:13 -0400 ```

not sure though if testing under NFS HOME would also go through smoothly -- e.g. we are still running into NFS issues in testing datalad there

[yarikoptic]

nfs-home is green -- good!

@jwodder and @joeyh - your feedback on dropping testing with NFS /tmp would be appreciated.

[yarikoptic]

ok, I will proceed as is to bring it into the green, but feedback would still be appreciated - we can always change later