upgrade to pydantic ^2

[ITProKyle]

Why This Is Needed

• pydantic ^1 has been in maintenance mode for some time now
• newer versions of type checkers (e.g. pyright) need fixes that are only available in pydantic ^2
• resolves Upgrade Pydantic to v2 #2101

What Changed

Added

• added eval-type-backport as a dependency for python < 3.10
  • enables the use of | syntax in pydantic models

Changed

• changed pydantic requirement from ^1.4 to ^2.8.0
• updated pyright to the latest version
• adjusted type annotations and type guarding logic to pass type checking

Fixed

• fixed issues with type annotations enabling pyright to be updated to the latest version

Removed

• removed uses of typing.Option and typing.Union

[codecov]

Codecov Report

Attention: Patch coverage is 96.20991% with 52 lines in your changes missing coverage. Please review.

Project coverage is 90.17%. Comparing base (2c00768) to head (bb4786e).
Report is 1 commits behind head on master.

Files	Patch %	Lines
runway/cfngin/hooks/staticsite/build_staticsite.py	0.00%	10 Missing ⚠️
...gin/hooks/staticsite/auth_at_edge/lambda_config.py	0.00%	7 Missing ⚠️
.../staticsite/auth_at_edge/callback_url_retriever.py	0.00%	6 Missing ⚠️
runway/blueprints/staticsite/staticsite.py	0.00%	5 Missing ⚠️
...in/hooks/staticsite/auth_at_edge/client_updater.py	0.00%	5 Missing ⚠️
runway/blueprints/staticsite/auth_at_edge.py	0.00%	2 Missing ⚠️
runway/blueprints/staticsite/dependencies.py	0.00%	2 Missing ⚠️
runway/cfngin/blueprints/testutil.py	0.00%	2 Missing ⚠️
...in/hooks/staticsite/auth_at_edge/domain_updater.py	0.00%	2 Missing ⚠️
runway/s3_utils.py	0.00%	2 Missing ⚠️
... and 9 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2518      +/-   ##
==========================================
+ Coverage   90.15%   90.17%   +0.01%     
==========================================
  Files         247      256       +9     
  Lines       15610    15650      +40     
==========================================
+ Hits        14073    14112      +39     
- Misses       1537     1538       +1     

Files	Coverage Δ
runway/_cli/commands/_gen_sample/_k8s_cfn_repo.py	100.00% <100.00%> (ø)
runway/_cli/commands/_gen_sample/utils.py	100.00% <100.00%> (ø)
runway/_cli/commands/_schema/_cfngin.py	100.00% <100.00%> (ø)
runway/_cli/commands/_schema/_runway.py	100.00% <100.00%> (ø)
runway/_cli/commands/_tfenv/_uninstall.py	100.00% <100.00%> (ø)
runway/cfngin/actions/deploy.py	85.29% <100.00%> (ø)
runway/cfngin/actions/diff.py	81.48% <100.00%> (ø)
runway/cfngin/blueprints/base.py	100.00% <100.00%> (ø)
runway/cfngin/blueprints/cfngin_bucket.py	100.00% <100.00%> (ø)
runway/cfngin/blueprints/raw.py	98.86% <100.00%> (ø)
... and 137 more

... and 1 file with indirect coverage changes

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