Avoid Allocating RowDimension Unneccesarily

[oleibman]

This PR builds on PR #3527, introduced but subsequently closed by @goetas. The observation was that AutoFilter did not need to allocate a new RowDimension when the row was not to be filtered. While vetting the PR, it became apparent that Xlsx Writer also allocates RowDimension unnecessarily, with some minor adjustments possible for Ods and Mpdf as well. My tests confirm the initial observation that there can be a considerable memory savings when RowDimension is allocated only when needed. So, even though the original PR is withdrawn, there seems to be value in proceeding with it anyhow.

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?

Provide an explanation of why this change is needed, with links to any Issues (if appropriate).
If this is a bugfix or a new feature, and there are no existing Issues, then please also create an issue that will make it easier to track progress with this PR.