RFR: 8077587: BigInteger Roots [v5]

[fabioromano1]

> This PR implements nth root computation for BigIntegers using Newton method.

fabioromano1 has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 44 commits:

 - Merge branch 'openjdk:master' into nth-root-branch
 - Update to resolve conflicts
 - An optimization
 - Correct unsigned division
 - Correct typo in comment
 - No need to avoid overflow
 - Merge branch 'openjdk:master' into BigInteger-nth-root
 - Optimized nth root iteration loop
 - Systematization of special cases in BigInteger.pow(int)
 - Some optimizations
 - ... and 34 more: https://git.openjdk.org/jdk/compare/fa7c5a65...4729a468

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Changes: https://git.openjdk.org/jdk/pull/24898/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24898&range=04
  Stats: 136 lines in 1 file changed: 136 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24898.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24898/head:pull/24898

PR: https://git.openjdk.org/jdk/pull/24898