Tests: consistency in terminology

[jrfnl]

Context

• Improve consistency in terminology used.

Summary

This PR can be summarized in the following changelog entry:

• Improve consistency in terminology used.

Relevant technical choices:

Related to/follow up on #313

The "integration" tests are being renamed to "WP (unit) tests".

This commit updates the references to these tests in the Composer scripts and the GH Actions workflows to follow the new terminology.

Note: the "old" integration-test and integration-coverage Composer scripts will still be available for the time being to facilitate the switch over and give the teams a little time to get used to the new script names.

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

• Check if the GH actions builds run correctly
• Check if code coverage is correctly uploaded and recorded.
• Locally check the new scripts (and the old) work correctly.

[coveralls]

Pull Request Test Coverage Report for Build 6408467062

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall first build on JRF/tests-improve-terminology-consistency at 48.608%

---

Totals
Change from base Build 6408462173:	48.6%
Covered Lines:	1100
Relevant Lines:	2263

---

💛 - Coveralls