RFR: 8365264: Rename ResourceHashtable to HashTable [v3]

[Johan Sjölen]

> Hi,
> 
> This PR renames `ResourceHashtable` to `HashTable`. The "resource" part of the name isn't true anymore, it does many types of allocations. The RHT should be HT to signify that it's the default choice of hashtable in Hotspot.
> 
> I didn't change any copyright years for this change.
> 
> Thanks

Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:

  This should be preferred

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26729/files
  - new: https://git.openjdk.org/jdk/pull/26729/files/c7ce8dea..4e143035

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26729&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26729&range=01-02

  Stats: 36 lines in 16 files changed: 18 ins; 16 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26729.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26729/head:pull/26729

PR: https://git.openjdk.org/jdk/pull/26729