ansible: dynamically exclude jenkins-workspace

[richardlau]

The ansible/playbooks/jenkins/worker/create.yml playbook runs some tasks at the end to remove Node.js and check there is no runnable node in the path. This is done on all test and release machines with the exception of the jenkins-workspace machines, which need a runnable node to run the linters.

Previously each jenkins-workspace machine was listed as an exclusion to hosts. This PR moves the exclusion into the tasks and checks if the host has an alias that begins jenkins-workspace (as all of our jenkins-workspace machines are defined). This will avoid one place that we have to remember to manually update every time we add/remove a jenkins-workspace machine.

[richardlau]

This was something I missed reviewing #3815 and meant that the playbook was removing node from the new jenkins-workspace machines because they weren't being excluded from those tasks.

With this PR they now are excluded without having to manually add them:

PLAY [test,release,!test-equinix-ubuntu2204-x64-1,!test-equinix-ubuntu2204-x64-2,!test-ibm-ubuntu2204-x64-3] ****************************************************************************************************

TASK [remove node and npm packages] *****************************************************************************************************************************************************************************
skipping: [test-mnx-ubuntu2204-x64-1] => (item=node)  => {"ansible_loop_var": "package", "changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "package": "node", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-2] => (item=node)  => {"ansible_loop_var": "package", "changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "package": "node", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-1] => (item=nodejs)  => {"ansible_loop_var": "package", "changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "package": "nodejs", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-1] => (item=npm)  => {"ansible_loop_var": "package", "changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "package": "npm", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-1] => {"changed": false, "msg": "All items skipped"}
skipping: [test-mnx-ubuntu2204-x64-2] => (item=nodejs)  => {"ansible_loop_var": "package", "changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "package": "nodejs", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-2] => (item=npm)  => {"ansible_loop_var": "package", "changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "package": "npm", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-2] => {"changed": false, "msg": "All items skipped"}

TASK [fail if node is in the path - please uninstall it] ********************************************************************************************************************************************************
skipping: [test-mnx-ubuntu2204-x64-1] => {"changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-2] => {"changed": false, "false_condition": "not (alias is defined and alias is match('jenkins-workspace.*'))", "skip_reason": "Conditional result was False"}

TASK [fail if node is in the path - please uninstall it] ********************************************************************************************************************************************************
skipping: [test-mnx-ubuntu2204-x64-1] => {"changed": false, "false_condition": "os|startswith(\"win\")", "skip_reason": "Conditional result was False"}
skipping: [test-mnx-ubuntu2204-x64-2] => {"changed": false, "false_condition": "os|startswith(\"win\")", "skip_reason": "Conditional result was False"}

PLAY RECAP ******************************************************************************************************************************************************************************************************
test-mnx-ubuntu2204-x64-1  : ok=56   changed=1    unreachable=0    failed=0    skipped=125  rescued=0    ignored=0
test-mnx-ubuntu2204-x64-2  : ok=56   changed=1    unreachable=0    failed=0    skipped=125  rescued=0    ignored=0

[richardlau]

Technically this one isn't needed -- we have no "win*" hosts that are also jenkins-workspace but I've added it for consistency with all the other tasks.