feat: update to aws-sdk-go-v2

[BATMAN-JD]

What is being added?

1. Dependencies

• Migrated from github.com/aws/aws-sdk-go (v1) to github.com/aws/aws-sdk-go-v2
• Added github.com/aws/smithy-go for error handling
• AWS SDK v1 completely removed from dependencies

2. API Signatures

• Added context.Context as first parameter to all AWS API calls
• Updated client initialization from session.NewSession() to config.LoadDefaultConfig()

3. Type System

• AWS types moved to separate packages (iamtypes, organizationstypes, ec2types, etc.)
• Slice types changed from pointers to values: []*Type → []Type
• Boolean fields changed from pointers to values: *bool → bool
• String constants changed to typed enums (e.g., aws.String("ACCOUNT") → organizationstypes.ChildTypeAccount)
• Integer types updated where required: aws.Int64() → aws.Int32()

4. Error Handling

• Replaced awserr.Error with smithy.APIError
• Updated error checking from type assertions to errors.As() pattern

5. Tests

• Updated all mock expectations with gomock.Any() for context parameters
• Fixed test assertions for v2 SDK error types
• All unit tests passing (100% success rate)

What Stayed the Same

• ✅ Zero functional changes - all business logic identical

• ✅ Same AWS operations performed

• ✅ Same error handling behavior (different types, same logic)

• ✅ No API endpoint changes

• ✅ No configuration changes required for deployments

• I have tested this locally

• I have included unit tests

• I have updated any corresponding documentation

Steps To Manually Test

Please provide us steps to reproduce the scenarios needed to test this. If an integration test is provided, let us know how to run it. If not, enumerate the steps to validate this does what it's supposed to.

1. Start the operator
2. Run the thing
3. Observe X in the spec for the thing
4. Clean up the thing

SREP-1187

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: BATMAN-JD
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[joshbranham]

/retest

[codecov-commenter]

Codecov Report

❌ Patch coverage is 43.81223% with 395 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.93%. Comparing base (f4c23f2) to head (0a32493).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/awsclient/client.go	13.44%	206 Missing ⚠️
...ountaccess/awsfederatedaccountaccess_controller.go	28.75%	54 Missing and 3 partials ⚠️
controllers/accountclaim/reuse.go	32.50%	26 Missing and 1 partial ⚠️
pkg/awsclient/iam.go	38.70%	18 Missing and 1 partial ⚠️
controllers/account/service_quota.go	26.31%	12 Missing and 2 partials ⚠️
controllers/account/account_controller.go	59.37%	13 Missing ⚠️
...rs/awsfederatedrole/awsfederatedrole_controller.go	0.00%	13 Missing ⚠️
controllers/account/cases.go	28.57%	10 Missing ⚠️
controllers/account/iam.go	80.85%	8 Missing and 1 partial ⚠️
controllers/account/ec2.go	88.67%	6 Missing ⚠️
... and 6 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #910      +/-   ##
==========================================
- Coverage   47.22%   46.93%   -0.30%     
==========================================
  Files          46       46              
  Lines        6621     6673      +52     
==========================================
+ Hits         3127     3132       +5     
- Misses       3175     3224      +49     
+ Partials      319      317       -2     

Files with missing lines	Coverage Δ
controllers/account/byoc.go	67.17% <100.00%> (-0.34%)	⬇️
pkg/awsclient/sts/sts_assume_role.go	76.81% <100.00%> (+0.34%)	⬆️
pkg/awsclient/tags.go	100.00% <100.00%> (ø)
pkg/localmetrics/localmetrics.go	54.74% <100.00%> (+0.16%)	⬆️
pkg/utils/utils.go	80.00% <100.00%> (+0.16%)	⬆️
main.go	0.00% <0.00%> (ø)
...ollers/validation/account_validation_controller.go	45.61% <83.33%> (+0.11%)	⬆️
controllers/accountclaim/organizational_units.go	85.52% <85.00%> (-0.29%)	⬇️
...ontrollers/accountclaim/accountclaim_controller.go	54.24% <60.00%> (ø)
pkg/totalaccountwatcher/totalaccountwatcher.go	63.39% <50.00%> (-0.25%)	⬇️
... and 11 more

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[openshift-ci]

@BATMAN-JD: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/lint	0a32493	link	true	/test lint
ci/prow/validate	0a32493	link	true	/test validate

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