Update S3 String Classes + Add new features to ValidatedStr parent class

[rpmcginty]

• wip
• updating ValidatedStr to support sanitization, use PostInit construct
• remove unused imports
• revamp S3 path/bucket/key validated string classes

What's in this change?

Addressing -> https://alleninstitute.atlassian.net/browse/DT-7113

Primary incentive is refining the S3Path string class to support spaces (among other special characters - see here).

• Updating S3Path to use ValidatedStr
  • fixing some previous missed validation
  • utilizing regex to do all validation
  • constraining levels of validation from doing all or no validation (full_validation) to only providing the option to allow placeholders (allow_placeholders).
    • S3BucketName and S3Key also support this individually as string classes too.
• Updating ValidatedStr with new features
  • adding ability to specify __post_init__
  • adding a _sanitize class method which allows the support for basic sanitization.

Tests

• adding comprehensive testing.

[codecov]

Codecov Report

Attention: Patch coverage is 99.18699% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.65%. Comparing base (abc195e) to head (79fc466).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aibs_informatics_core/collections.py	98.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   96.55%   96.65%   +0.10%     
==========================================
  Files          54       54              
  Lines        3544     3561      +17     
  Branches      401      403       +2     
==========================================
+ Hits         3422     3442      +20     
+ Misses         69       68       -1     
+ Partials       53       51       -2     

Files with missing lines	Coverage Δ
src/aibs_informatics_core/models/aws/s3.py	97.30% <100.00%> (+0.11%)	⬆️
...rmatics_core/models/demand_execution/parameters.py	96.73% <100.00%> (ø)
src/aibs_informatics_core/models/version.py	92.85% <ø> (ø)
src/aibs_informatics_core/utils/multiprocessing.py	100.00% <ø> (ø)
src/aibs_informatics_core/collections.py	98.19% <98.33%> (+0.53%)	⬆️

... and 1 file with indirect coverage changes