Write ignoredErrors Tag Before Drawings

[oleibman]

Fix #4200. Fix #4145. Although the Xml is valid, Excel insists that worksheet.xml specifies ignoredErrors (introduced with 1.29.0) before legacyDrawing or drawing.

This is:

• a bugfix
• a new feature
• refactoring
• additional unit tests

Checklist:

• Changes are covered by unit tests
  • Changes are covered by existing unit tests
  • New unit tests have been added
• Code style is respected
• Commit message explains why the change is made (see https://github.com/erlang/otp/wiki/Writing-good-commit-messages)
• CHANGELOG.md contains a short summary of the change and a link to the pull request if applicable
• Documentation is updated as necessary

Why this change is needed?

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