[lworld] RFR: 8378105: [lworld] [REDO] Follow up 8329433 for Valhalla entry points in nmethod [v2]

[Manuel Hässig]

> This is a redo of #2116.
> 
> This PR makes the necessary changes to also make the inline entry point fields in the nmethod class a `uint16_t` like JDK-8329433 did for the other entry points. Importantly, this PR preserves the default values necessary for unused entry points.
> 
> Testing:
> - [ ] tier1,tier2,tier3

Manuel Hässig has updated the pull request incrementally with one additional commit since the last revision:

  Remove relocate lambda

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/2123/files
  - new: https://git.openjdk.org/valhalla/pull/2123/files/a6418009..8b3df03f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2123&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2123&range=00-01

  Stats: 9 lines in 1 file changed: 2 ins; 2 del; 5 mod
  Patch: https://git.openjdk.org/valhalla/pull/2123.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2123/head:pull/2123

PR: https://git.openjdk.org/valhalla/pull/2123