`jenkins-workspace` tasks don't work on existing workers

[targos]

Even after #3722, it fails at this step:

TASK [jenkins-workspace : Initialize Git repository] *******************************************************************
fatal: [test-equinix-ubuntu2204-x64-2]: FAILED! => {"changed": false, "cmd": "/usr/bin/git clone --bare https://github.com/nodejs/node /home/binary_tmp/binary_tmp.git", "msg": "Cloning into bare repository '/home/binary_tmp/binary_tmp.git'...\nfatal: Invalid path '/home/iojs/build': Permission denied", "rc": 128, "stderr": "Cloning into bare repository '/home/binary_tmp/binary_tmp.git'...\nfatal: Invalid path '/home/iojs/build': Permission denied\n", "stderr_lines": ["Cloning into bare repository '/home/binary_tmp/binary_tmp.git'...", "fatal: Invalid path '/home/iojs/build': Permission denied"], "stdout": "", "stdout_lines": []}

[richardlau]

I think a lot of this weirdness is coming from

build/ansible/roles/jenkins-workspace/tasks/main.yml

Lines 42 to 43 in 97b592a

	# Repository needs to be created in /home/iojs/build because the partition with
	# free space might be mounted in a way that does not include /home/binary_tmp

which means we're trying to create a git repository owned by binary_tmp into a directory under the home for a different user, iojs.

For the current machines, the comment about partitions only applies to the IBM hosted machine where the bigger disk is mounted at /home/iojs. I'm not sure why we couldn't mount the disk at /home instead and then just create the git repository under the home directory of the binary_tmp user.