Unit tests not isolated from local aws config file

[aajtodd]

Describe the bug

Running make unit on clean project checkout fails unit tests when ~/.aws/credentials has stale credentials

Expected Behavior

Tests should run without failure

Current Behavior

Failure from make unit

2023/01/23 16:10:22 config: go test -tags example,codegen,integration,ec2env,perftest -run NONE ./... =>                                                                           
--- FAIL: TestResolveCredentialsIMDSClient (0.01s)                                                                                                                                 
    --- FAIL: TestResolveCredentialsIMDSClient/env_var_DISABLED_true (0.00s)                                                                                                       
        resolve_credentials_test.go:505: unexpected error: <nil>                                                                                                                   
    --- FAIL: TestResolveCredentialsIMDSClient/env_var_DISABLED_false (0.00s)                                                                                                      
        resolve_credentials_test.go:495: expect error got none                                                                                                                     
    --- FAIL: TestResolveCredentialsIMDSClient/option_state_enabled_overrides_env_var_DISABLED_true (0.00s)                                                                        
        resolve_credentials_test.go:495: expect error got none                                                                                                                     
    --- FAIL: TestResolveCredentialsIMDSClient/option_state_disabled_overrides_env_var_DISABLED_false (0.00s)                                                                      
        resolve_credentials_test.go:505: unexpected error: <nil>                                                                                                                   
    --- FAIL: TestResolveCredentialsIMDSClient/default_no_options (0.00s)                                                                                                          
        resolve_credentials_test.go:495: expect error got none                                                                                                                     
    --- FAIL: TestResolveCredentialsIMDSClient/state_enabled (0.00s)                                                                                                               
        resolve_credentials_test.go:495: expect error got none                                                                                                                     
    --- FAIL: TestResolveCredentialsIMDSClient/state_disabled (0.00s)                                                                                                              
        resolve_credentials_test.go:505: unexpected error: <nil>                                                                                                                   
2023/01/23 16:10:31 http: TLS handshake error from 127.0.0.1:60862: remote error: tls: bad certificate                                                                             
FAIL                                                                                                                                                                               
FAIL    github.com/aws/aws-sdk-go-v2/config     11.296s                                                                                                                            
FAIL                                                                                                                                                                               
2023/01/23 16:10:36 config: go test -timeout=1m  ./... => error: failed to run command, exit status 1                                                                              
2023/01/23 16:10:36 a command failed                                                                                                                                               
exit status 1                                                                                                                                                                      
make: *** [unit-modules-.] Error 1             

Reproduction Steps

Create the [default] profile in ~/.aws/credentials with stale/expired session credentials

Possible Solution

Update unit tests to be isolated from local environment

Additional Information/Context

No response

AWS Go SDK V2 Module Versions Used

github.com/aws/aws-sdk-go-v2/config @ f95afa9

Compiler and Version used

1.17.6

Operating System and version

macOS 12.6.2

[isaiahvita]

this also happens with rogue aws environment variables. for example, if i have this set

AWS_EC2_METADATA_DISABLED=true

then i get the same error

[github-actions]

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