refactor(aws-creds-cache): set default cache expiry to 1 hour (#3365)

> All credential providers passed to or returned by LoadDefaultConfig
are wrapped in a
[CredentialsCache](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#CredentialsCache)
automatically. This enables caching and credential rotation that is
concurrency safe. If you explicitly configure a provider on aws.Config
directly, you must also explicitly wrap the provider with this type
using
[NewCredentialsCache](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws#NewCredentialsCache).

Not sure if we can fully remove the cache, but we can make the cache
expiry to 1 hour before creds expire so the creds are valid for atleast
1 hour

Author: iamKunalGupta

flow/connectors/utils/aws.go

@@ -295,6 +295,10 @@ func GetAWSCredentialsProvider(ctx context.Context, connectorName string, peerCr
 	}
 
 	awsConfig, err := config.LoadDefaultConfig(ctx, func(options *config.LoadOptions) error {
+		options.CredentialsCacheOptions = func(options *aws.CredentialsCacheOptions) {
+			options.ExpiryWindow = time.Hour
+			options.ExpiryWindowJitterFrac = 0
+		}
 		return nil
 	})
 	if err != nil {