RFR: 8330005: RandomGeneratorFactory.getDefault() throws exception when the runtime image only has java.base module

[Raffaello Giulietti]

Move all random generators mandated in package `java.util.random` and currently implemented in module `jdk.random` to module `java.base`, and remove module `jdk.random`.

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Commit messages:
 - 8330005: RandomGeneratorFactory.getDefault() throws exception when the runtime image only has java.base module

Changes: https://git.openjdk.org/jdk/pull/18932/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18932&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330005
  Stats: 78 lines in 12 files changed: 11 ins; 65 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18932.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18932/head:pull/18932

PR: https://git.openjdk.org/jdk/pull/18932