Revert "Remove addCompileTimeError in favor of addProblem"

This reverts commit f872c17a85c309df54a680e63c71c2a52ed496d1.

Reason for revert: After the CQ was green someone else made changes which this CL is not compatible with. The CQ lands if the tests passed
and doesn't rebase before doing so. 


Original change's description:
> Remove addCompileTimeError in favor of addProblem
> 
> Replace most methods with names containing CompileTimeError with corresponding
> Problem methods.
> 
> Also make Severity.error the default severity.
> 
> Change-Id: I85a340168848cd3b4375b3f53cb0361251ed6e5d
> Reviewed-on: https://dart-review.googlesource.com/73100
> Commit-Queue: Peter von der Ahé <ahe@google.com>
> Reviewed-by: Jens Johansen <jensj@google.com>

TBR=ahe@google.com,jensj@google.com

Change-Id: I3ea736a9752805adb3bacc8b67e8eb1435c1bf69
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/73181
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
33 files changed
tree: 19bcc21e9e66b149d64bb4c84703c4a0aaf5fd29
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. dartdoc_options.yaml
  27. DEPS
  28. LICENSE
  29. PATENTS
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. WATCHLISTS
README.md

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