RFR: 8376707: Template-Framework Library: Primitive Types Abbreviation Methods

[Manuel Hässig]

This PR adds two convenience methods for abbreviating `PrimitiveType`s in the Template Framework.

Testing:
 - [x] Run the Template Framework tests
 - [ ] Github Actions

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Commit messages:
 - Add methods for abbreviating primitive types

Changes: https://git.openjdk.org/jdk/pull/29506/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29506&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8376707
  Stats: 74 lines in 2 files changed: 73 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/29506.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29506/head:pull/29506

PR: https://git.openjdk.org/jdk/pull/29506