fix: Set variables from ThrowError command

[saig0]

Description

Adjust the handling of the ThrowError gRPC command to set the variables from the command to the job record. As a result, the variables are set as local variables of the error catch event.

Related issues

closes #1079

Definition of Done

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

Code changes:

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

Testing:

• [x] There are unit/integration tests that verify all acceptance criterias of the issue
• [x] 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[bot]]

Test Results

 50 files  ±0   50 suites  ±0   1m 59s :stopwatch: +11s 135 tests ±0  135 :white_check_mark: ±0  0 :zzz: ±0  0 :x: ±0  429 runs  ±0  429 :white_check_mark: ±0  0 :zzz: ±0  0 :x: ±0 

Results for commit d762234c. ± Comparison against base commit ba98409a.

[saig0]

@ana-vinogradova-camunda here is a small bug fix for a missing feature. Please have a look. :cookie:

[saig0]

bors merge

[ghost]

Build succeeded:

• Test summary

[backport-action]

Successfully created backport PR for stable/8.2:

• 1081

[backport-action]

Successfully created backport PR for stable/8.3:

• 1082

[backport-action]

Successfully created backport PR for stable/8.4:

• 1083