Integrated: 8261706: Swing test fails Metal API Validation with setVertexBytes error

[Jayathirth D V]

In MTLRenderer_DrawScanLines we are exceeding 4K limit for setVertexBytes and because of this we are seeing error with Metal API Validation enabled. Implemented logic to clamp vertex data to 4KB.

jtreg test passes with fix and also there are no sanity issues in J2DDemo, SwingSet2 and Font2DTest.

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Commit messages:
 - 8261706: Swing test fails Metal API Validation with setVertexBytes error

Changes: https://git.openjdk.java.net/lanai/pull/190/files
 Webrev: https://webrevs.openjdk.java.net/?repo=lanai&pr=190&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261706
  Stats: 71 lines in 1 file changed: 56 ins; 0 del; 15 mod
  Patch: https://git.openjdk.java.net/lanai/pull/190.diff
  Fetch: git fetch https://git.openjdk.java.net/lanai pull/190/head:pull/190

PR: https://git.openjdk.java.net/lanai/pull/190