Fix runner tags assignment when retrying a job

What does this MR do?

This MR fixes assigning runner tags to CI/CD job that has been retried.

In this MR I also try to improve tests to better detect missing attributes and relations that should have been cloned.

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug

What are the relevant issue numbers?

See !9409 (merged)
Closes #28846 (closed)

restored source branch fix/gb/fix-build-retry-tags-assignment

added 1 commit

• 6f843457 - Improve build retry service tests for cloning data

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/cc @godfat @ayufan

assigned to @ayufan

changed milestone to %9.0

resolved all discussions

added 1 commit

• 40ccfec8 - Move unused consts from retry build service to specs

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resolved all discussions

added 1 commit

• e81bb3e7 - Move unused consts from retry build service to specs

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added 1 commit

• c3d24d0b - Move unused consts from retry build service to specs

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resolved all discussions

@grzesiek Grzegorzu: https://gitlab.com/gitlab-org/gitlab-ce/builds/11468817 :)

assigned to @grzesiek

added 1 commit

• f0ba1ea3 - Fix Rubocop offense in build retry service

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added 1 commit

• f0ba1ea3 - Fix Rubocop offense in build retry service

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merged

mentioned in commit brunsa2/gitlab-ce@859a9cd9