RFR: 8341438: TextFlow: incorrect caretShape(), hitTest(), rangeShape() with non-empty padding/border

[Andy Goryachev]

## Summary
This change adds new methods to the `TextFlow` which work correctly in the presence of non-empty insets (borders/padding). For backward compatibility, the old buggy methods are getting deprecated (not for removal). Also, adds new methods in Text which provide missing functionality.

## Problem
A number of methods in `TextFlow` fail to return correct values in the presence of non-empty insets (i.e. when either padding or border are set):
- caretShape 
- hitTest 
- rangeShape

Additionally, the current API fail to provide strike-through shape, and account for line spacing in the range shape, a problem shared between the `TextFlow` and the `Text` classes.

## Solution
The solution is two-fold: 
1) deprecate the buggy methods (not for removal), adding explanations in their javadoc comments 
2) add new methods that behave correctly in the presence of non-empty insets and/or implementing the missing functionality.

The proposed solution retains the buggy methods for the purposes of backward compatibility in applications which employ the workarounds, while providing new APIs with additional parameters similar to those offered by the new TextLayout API https://bugs.openjdk.org/browse/JDK-8341670

## Testing

Additional visualization of the data returned by the new APIs is available in the Monkey Tester using the following branch (in the Text and TextFlow pages):

https://github.com/andy-goryachev-oracle/MonkeyTest/tree/text.insets.corrected

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Commit messages:
 - cleanup
 - Merge branch 'master' into 8341438.text.shapes.insets
 - layout info
 - tests
 - Merge remote-tracking branch 'origin/ag.text.layout.api' into 8341438.text.shapes.insets
 - cleanup
 - Merge remote-tracking branch 'origin/master' into ag.text.layout.api
 - Merge remote-tracking branch 'origin/master' into ag.text.layout.api
 - cleanup
 - removed getStrikeThroughShape
 - ... and 59 more: https://git.openjdk.org/jfx/compare/1ea980ea...c1d7029c

Changes: https://git.openjdk.org/jfx/pull/1817/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1817&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341438
  Stats: 555 lines in 5 files changed: 521 ins; 18 del; 16 mod
  Patch: https://git.openjdk.org/jfx/pull/1817.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1817/head:pull/1817

PR: https://git.openjdk.org/jfx/pull/1817