RFR: 8253101: Clean up CallStaticJavaNode EA flags

[Jason Tatton]

Please review this small change to cleanup fields: _is_scalar_replaceable and _is_non_escaping from CallStaticJavaNode as well as code which assigns to those fields.

The change was tested with run-test-tier[1-3] on Linux arm64 and x86-64.

Thanks,
Jason

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Commit messages:
 - 8253101

Changes: https://git.openjdk.java.net/jdk/pull/889/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=889&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253101
  Stats: 21 lines in 2 files changed: 0 ins; 21 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/889.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/889/head:pull/889

PR: https://git.openjdk.java.net/jdk/pull/889