i18n: Workspace PVC template modes are not translated when starting a pipeline

Description of problem:

Users which use another language then English and start a Pipeline or add a trigger to a Pipeline has the option to create an inline PersistentVolumeClaim template. The additional options (their values) are not translated:

• Dropdown values of the "StorageClass"
• AccessMode values "Single User (RWO)", "Shared Access (RWX)" and "Read Only (ROX)"
• Size dropdown values "MiB", "GiB" and "TiB" (unknown if we want to translate this!)
• Volume Mode "Filesystem" and "Block"

Prerequisites (if any, like setup, operators/versions):

1. Install OpenShift Pipelines operator (tested with 1.4)

Steps to Reproduce

1. Create a Pipeline (for example import a Deployment and enable the Pipeline option) which requires a workspace
2. Open the Pipeline detail page
3. Select the action "Start Pipeline" or "Add Trigger"
4. For your workspace select the option "VolumeClaimTemplate" and "Show VolumeClaimTemplate options"

And to verify this runs this steps with pseudo localization or with another language enabled.

Actual results:

Values are not translated, also not with pseudo localization.

Expected results:

Values should be ready for translation. At least pseudo localization should work.

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

tested on 4.8.0-0.nightly-2021-04-29-222100

Additional info:

Left over from https://bugzilla.redhat.com/show_bug.cgi?id=1941655, a fix must maybe wth synchronized with the admin team.