RFR: 8298639: Perform I/O operations in bulk for RandomAccessFile [v4]

[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 one additional commit since the last revision:

  Remove api note and redundant comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11644/files
  - new: https://git.openjdk.org/jdk/pull/11644/files/e4f3841e..1bbbcee4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11644&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11644&range=02-03

  Stats: 6 lines in 1 file changed: 0 ins; 6 del; 0 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