Fix delta abs value cut off

[lovincyrus]

This PR uses big-number display for delta abs in DimensionDisplay and widens the comparison columns. Closes https://linear.app/rilldata/issue/APP-46/the-display-of-absolute-delta-values-is-cut-off-in-tables

Before

After

Checklist:

• [ ] Covered by tests
• [ ] Ran it and it works as intended
• [ ] Reviewed the diff before requesting a review
• [ ] Checked for unhandled edge cases
• [ ] Linked the issues it closes
• [ ] Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• [ ] Intend to cherry-pick into the release branch
• [ ] I'm proud of this work!

[lovincyrus]

If these formatting changes look good, I'll go ahead and get the e2e fixed up. @djbarnwal

[lovincyrus]

This is ready for Product QA @ericokuma