[Backport 2.x] Add score based password verification

[willyborankin]

Backport 15860b6 from #2557

[codecov]

Codecov Report

Merging #2784 (4e69a2f) into 2.x (fa33fc5) will increase coverage by 0.05%.
The diff coverage is 84.69%.

@@             Coverage Diff              @@
##                2.x    #2784      +/-   ##
============================================
+ Coverage     61.15%   61.20%   +0.05%     
- Complexity     3306     3312       +6     
============================================
  Files           263      264       +1     
  Lines         18431    18507      +76     
  Branches       3259     3265       +6     
============================================
+ Hits          11272    11328      +56     
- Misses         5585     5599      +14     
- Partials       1574     1580       +6     

Impacted Files	Coverage Δ
...g/opensearch/security/support/ConfigConstants.java	94.44% <ø> (ø)
...ity/dlic/rest/validation/CredentialsValidator.java	70.00% <63.63%> (+4.21%)	⬆️
...curity/dlic/rest/validation/PasswordValidator.java	84.05% <84.05%> (ø)
.../opensearch/security/OpenSearchSecurityPlugin.java	80.31% <100.00%> (+0.19%)	⬆️
...est/validation/AbstractConfigurationValidator.java	83.64% <100.00%> (+1.09%)	⬆️

... and 6 files with indirect coverage changes