fix(experimentalIdentityAndAuth): add await to `signer.sign()` in `httpSigningMiddleware` · smithy-lang/smithy-typescript@5f07501

'context' is defined but never used

'EndpointBearer' is defined but never used

'FunctionName' is assigned a value but never used

'key' is defined but never used

'value' is defined but never used

'options' is defined but never used

'response' is assigned a value but never used

'response' is assigned a value but never used

'response' is assigned a value but never used

'response' is assigned a value but never used

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