RFR: 8314283: Support for NSS tests on aarch64 platforms [v2]

[Matthew Donovan]

> This PR updates the version of NSS to 3.91 and includes aarch64 platforms.
> 
> There is a related bug in PR (https://github.com/openjdk/jdk/pull/15217) so we may want to wait for that to merge before merging this one.

Matthew Donovan has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into pkcs11-nss-upgrade
 - 8314283: Support for NSS tests on aarch64 platforms

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15429/files
  - new: https://git.openjdk.org/jdk/pull/15429/files/c462b7e7..021b23e4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15429&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15429&range=00-01

  Stats: 121145 lines in 3305 files changed: 55777 ins; 25113 del; 40255 mod
  Patch: https://git.openjdk.org/jdk/pull/15429.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15429/head:pull/15429

PR: https://git.openjdk.org/jdk/pull/15429