RFR: 8240567: MethodTooLargeException thrown while creating a jlink image [v7]

[Oliver Kopp]

> Fix for [JDK-8240567](https://bugs.openjdk.org/browse/JDK-8240567): "MethodTooLargeException thrown while creating a jlink image".
> 
> Java still has a 64kb limit: A method may not be longer than 64kb. The idea of the fix is to split up the generated methods in several smaller methods
> 
> This is a follow-up to https://github.com/openjdk/jdk/pull/10704. GitHub did not allow me to re-open the PR, because I did a force-push to have one commit.

Oliver Kopp has updated the pull request incrementally with three additional commits since the last revision:

 - Add description
 - Fix nit (indent)
 - Add parameterization for the number of moduleDescriptors per helper method (was magic number 50 / 75 before)

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14408/files
  - new: https://git.openjdk.org/jdk/pull/14408/files/b61c1dc8..edd85c99

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14408&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14408&range=05-06

  Stats: 33 lines in 1 file changed: 23 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/14408.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14408/head:pull/14408

PR: https://git.openjdk.org/jdk/pull/14408