RFR: 8373231: ECDSAOperations::toAffinePoint is redundant [v2]

[John Jiang]

> `ECDSAOperations::toAffinePoint` should be removed, and `AffinePoint::fromECPoint` should be used instead.

John Jiang has updated the pull request incrementally with one additional commit since the last revision:

  Add the JBS ID to the test

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28691/files
  - new: https://git.openjdk.org/jdk/pull/28691/files/a1cebba7..1837abec

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28691&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28691&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28691.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28691/head:pull/28691

PR: https://git.openjdk.org/jdk/pull/28691