Add 'participant-' prefix to name and id inputs for clarity

[azeghers]

This PR adds a "participant-" prefix to the input labels defining the name and id of a participant in the properties panel.

Waiting for https://github.com/bpmn-io/bpmn-js-properties-panel/pull/413 to be merged and for the next version of https://github.com/bpmn-io/bpmn-js-properties-panel/ to be released so this PR can add the version bump and have everything working properly.

Acceptance Criteria

• [ ] Corresponds to the concept
• [ ] Corresponds to the design

Definition of Done

• [ ] corresponds to the design principles
• [ ] corresponds to the code standards
• [ ] passes Continuous Integration checks
• [ ] available as feature branch on GitHub
  • [ ] contains the cleaned up commit history
  • [ ] commit messages satisfy our commit message guidelines
  • [ ] a single commit closes the issue via Closes #issuenr

[nikku]

What is missing on this one?

[azeghers]

Seemingly nothing, it shouldn't break anything if it's merged but it won't have any effect before the next version of bpmn-js-properties-panel is released. I wanted to get everything done at once and bump the version in this PR.

[nikku]

So we're currently pending a release of the properties panel.

Anything that prevents us from releasing it? If not, let's go ahead and get the linked issues, including this one, closed.