This upgrades the JLine embedded in the JDK to JLine 4.0.12.

The upgrade as such was not very difficult, but for historical reasons was done in two steps: I first upgraded to 4.0.9 using a usual process of taking a diff between existing master and the corresponding JLine (3.29.0 in this case), then replacing it with unmodified new version of JLine and re-applying the patch. The I upgraded from 4.0.9 to 4.0.12 by applying just the relevant differences between these two versions.

Other important notes:

• I had to manually disable running of infocmp: https://github.com/lahodaj/jdk/blob/1455a3279f9261ca9ee8590172b1e4d1fc5e35ca/src/jdk.internal.le/share/classes/jdk/internal/org/jline/utils/InfoCmp.java#L606 ; jdk.internal.le will implicitly now fallback on ansi if it does not recognize the terminal.
• when reading a password on a dumb terminal, the new JLine uses a background thread to remove the password from the terminal. To keep tests stable and predictable, I had to add a way to disable this, see: https://github.com/lahodaj/jdk/blob/1455a3279f9261ca9ee8590172b1e4d1fc5e35ca/src/jdk.internal.le/share/classes/jdk/internal/org/jline/reader/impl/LineReaderImpl.java#L95 and the usages.
• the new JLine has some support for graphics on the terminal, but that requires a dependency on java.desktop, and we don't have a use for it at this time. And the graphics support is fairly standalone, can be avoided/not-included. So this upgrade is not including this graphics support.

To potentially help with the review, this is the patch between JLine 3.29.0 and master:
https://cr.openjdk.org/~jlahoda/8381868/jline-patch-3.29.0-2.diff

this is the patch between JLine 4.0.12 and the code proposed in this PR:
https://cr.openjdk.org/~jlahoda/8381868/jline-patch-4.0.12.diff

and this is a meta-diff between these two diffs:
https://cr.openjdk.org/~jlahoda/8381868/diff-of-diffs-3.29.0-4.0.12.diff

the meta diff is not straightforward to read, but I went through it, and it seems OK to me.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8381868: Upgrade to JLine 4.0.12 (Task - P3)

Reviewers

• Adam Sotona (@asotona - Reviewer)

Reviewing