RFR: 8298639: Perform I/O operations in bulk for RandomAccessFile [v3]

[Per Minborg]

> This PR suggests improving performance for read and write operations for the longer primitives in `RandomAccessFile`.
> 
> These improvements would also propagate to other JDK classes relying on these improved `RandomAccessFile` operations.

Per Minborg has updated the pull request incrementally with three additional commits since the last revision:

 - Improve benchmarks
 - Add benchmark
 - Use Bits instead of custom code

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/11644/files
  - new: https://git.openjdk.org/jdk/pull/11644/files/4fab79c9..e4f3841e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11644&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11644&range=01-02

  Stats: 174 lines in 2 files changed: 134 ins; 28 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/11644.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11644/head:pull/11644

PR: https://git.openjdk.org/jdk/pull/11644