RFR: 8337654: Relocate uncommon trap stub from SharedRuntime to OptoRuntime [v4]

[Andrew Dinn]

> Reorganization of generation and management code for C2-specific blob so that it is, as far as possible, under the scope of class OptoRuntime with an implementation located in C2-specific source files.

Andrew Dinn has updated the pull request incrementally with one additional commit since the last revision:

  correct riscv source

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Changes:
  - all: https://git.openjdk.org/jdk/pull/20417/files
  - new: https://git.openjdk.org/jdk/pull/20417/files/7d7b3288..15fb5fa0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20417&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20417&range=02-03

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/20417.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20417/head:pull/20417

PR: https://git.openjdk.org/jdk/pull/20417