RFR: 8375271: [IR Framework] Rename IREncoding to ApplicableIRRules and driver/flag/test VM to Driver/Flag/Test VM [v3]

[Christian Hagedorn]

> This patch is part of a series of patches split of from a prototype implementation for replacing the hotspot-pid file based transfer of IR dumps between the Test VM and the Driver VM with a socket based transfer (see [JDK-8375271](https://bugs.openjdk.org/browse/JDK-8375271) for more information). This should ease reviews.
> 
> This patch is about naming updates:
> 
> `IREncoding` is quite generic and does not really tell what it is about by looking at its name. I suggest to rename it to `ApplicableIRRules` to better reflect what it is about. I also capitalized the first letter of "driver/flag/test VM" to better indicate that these are proper names.
> 
> Thanks,
> Christian

Christian Hagedorn has updated the pull request incrementally with one additional commit since the last revision:

  Update test/hotspot/jtreg/compiler/lib/ir_framework/flag/FlagVM.java
  
  Co-authored-by: Damon Fenacci <damon.fenacci at oracle.com>

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/29229/files
  - new: https://git.openjdk.org/jdk/pull/29229/files/17afa9ac..32a42462

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29229&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29229&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/29229.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29229/head:pull/29229

PR: https://git.openjdk.org/jdk/pull/29229