Fix and stabilize column widths and row heights calculations

[budnix]

Context

The PR fixes a bug that caused the viewport position to be incorrectly calculated when the viewport was scrolled and the row or column had a non-standard width/height defined. The bug was that the width/height calculations were triggered after the calculators were created, which caused viewport misalignment. Values ​​calculated by the plugins were not taken into account when calculators calculated the viewport position (position of the wtSpreader element). The PR fixes this by moving the size calculations to a moment before calculators are created.

Other changes:

• Stabilize calculating the first column width. Previously, the column width calculation skipped 1px when the viewport was not scrolled horizontally. After scrolling, it was ok. Excluding GhostTable from CSS rules fixed the issue (change);
• Unified the API between AutoRowSize and AutoColumnSize plugins;
  • Added a new calculateVisibleRowsHeight method to the AutoRowSize plugin. The same method already existed in the second AutoColumnSize plugin;
  • Unify the clearCache method for both plugins.

How has this been tested?

I tested the changes locally and I covered the fix with new tests.

Types of changes

• New feature or improvement (non-breaking change which adds functionality)

Related issue(s):

1. fixes https://github.com/handsontable/dev-handsontable/issues/1888

Affected project(s):

• handsontable

Checklist:

• I have reviewed the guidelines about Contributing to Handsontable and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement

[github-actions]

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npm run docs:review 99027e0abba800fd641c7a0a27b6718487715948

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