Remove references to Camunda Cloud

[remcowesterhoud]

Description

Removes the references to Camunda Cloud by renaming it to Camunda Platform 8, or by redirecting the camunda organisation on GitHub instead of the Camunda-cloud organisation.

Related issues

closes #617

Definition of Done

Not all items need to be done depending on the issue and the pull request.

Code changes:

• The changes are backwards compatibility with previous versions
• If it fixes a bug then PRs are created to backport the fix

Testing:

• There are unit/integration tests that verify all acceptance criterias of the issue
• New tests are written to ensure backwards compatibility with further versions
• The behavior is tested manually

Documentation:

• Javadoc has been written
• The documentation is updated

[github-actions]

Test Results

  47 files  ±0    47 suites  ±0   2m 0s ⏱️ -4s
113 tests ±0  113 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
362 runs  ±0  362 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 70efcb0. ± Comparison against base commit 43330a1.

[korthout]

Love it 💯

bors merge

[ghost]

Build succeeded:

• Test summary