Enforce dependency on build image for clang-tidy and uncompiled-files.

Issue/feature addressed

clang-tidy and uncompiled-files CI jobs may fail because they have the dependency specified in the template removed in the actual jobs.

Proposed solution

Put the dependency and image in the job specification itself, rather than in the template.

Implementation

Change the jobs in the .gitlab-ci.yml.

Tests

Suggested reviewers

@dmoxey

Notes

N/A

Checklist

• Functions and classes, or changes to them, are documented.
• User guide/documentation is updated.
• Changelog is updated.
• Suitable tests added for new functionality.
• Contributed code is correctly formatted. (See the contributing guidelines).
• License added to any new files.
• No extraneous files have been added (e.g. compiler output or test data files).