Add the introductionVersion field to all existing environment variables

[dragonchaser]

Prerequisite to #8258

• Add the introductionVersion field to all existing environment variables
• The value MUST be pre5.0 (all newer Variables get their correct value upon introduction) for all currently existing variables in all services.
• This Task needs to be commited before release 5.0

[dragonchaser]

A make target to validate the work can be found in #8436 just run make check-env-var-annotations from the project root.

[dragonchaser]

Mentioned make target has been merged to master

[kulmann]

@jacob-nv do you have capacity to look into this?

[kulmann]

@individual-it @phil-davis do you guys have someone who could get this done quickly? It's a super easy task, busy work.

[phil-davis]

@saw-jan I am having a look at what is involved in this. If it can be automated pretty well in the IDE then I might "just do it", or I will hand over for someone to do when I understand what variations there are that need to be "manually" edited.

[phil-davis]

PR #8469 is ready for review and discussion.

[phil-davis]

PR #8574 added this to ocis master.
Backport to stable-5.0 was done in PR #8583

make check-env-var-annotations was added to CI in both these PRs.

I think that this is done. @dragonchaser close? Or is there anything else to tweak?