RFR: 8175874: Update Security.insertProviderAt to specify behavior when requested position is out of range. [v5]

[Ben Perez]

> Fixing the bug as stated would cause compatibility issues. E.g. the `addProvider` function always adds new providers at position 0 and therefore would always throw an error. Instead of changing how the function handles indices, we instead have added this behavior to the function spec.

Ben Perez has updated the pull request incrementally with one additional commit since the last revision:

  Simplified test in ChangeProviders

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14925/files
  - new: https://git.openjdk.org/jdk/pull/14925/files/80b37367..71bb6a6a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14925&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14925&range=03-04

  Stats: 12 lines in 2 files changed: 0 ins; 3 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/14925.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14925/head:pull/14925

PR: https://git.openjdk.org/jdk/pull/14925