RFR: 8293324: ciField.hpp has two methods to return field's offset [v2]

[Ilya Korennoy]

> Small refactoring of ciField.hpp method `offset()` removed and  `offset_in_bytes()` used instead.
> 
> Test: tier1 linux-x86_64

Ilya Korennoy has updated the pull request incrementally with one additional commit since the last revision:

  8293324: Update the copyright dates

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/13003/files
  - new: https://git.openjdk.org/jdk/pull/13003/files/3d94cab0..29e36aa9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13003&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13003&range=00-01

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13003.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/13003/head:pull/13003

PR: https://git.openjdk.org/jdk/pull/13003