Add HttpAuthScheme interfaces for auth scheme resolution

[syall]

Issue #, if available:

N/A.

Description of changes:

• Add additional HttpAuthScheme interfaces for auth scheme resolution
• Update HttpAuthSchemeProviderGenerator to use new interfaces

Testing:

Expected diff in the codegen changes in smithy-typescript-codegen-test:

diff --color -Nur smithy-typescript-codegen-test/build_old/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts
--- smithy-typescript-codegen-test/build_old/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts	2023-09-13 13:23:54
+++ smithy-typescript-codegen-test/build/smithyprojections/smithy-typescript-codegen-test/client-experimental-identity-and-auth/typescript-codegen/src/auth/httpAuthSchemeProvider.ts	2023-09-13 13:24:10
@@ -3,25 +3,23 @@
 import {
   HttpApiKeyAuthLocation,
   HttpAuthOption,
+  HttpAuthSchemeParameters,
+  HttpAuthSchemeParametersProvider,
+  HttpAuthSchemeProvider,
 } from "@smithy/experimental-identity-and-auth";
-import { HandlerExecutionContext } from "@smithy/types";
 import { normalizeProvider } from "@smithy/util-middleware";
 
 /**
  * @internal
  */
-export interface WeatherHttpAuthSchemeParameters {
-  operation?: string;
+export interface WeatherHttpAuthSchemeParameters extends HttpAuthSchemeParameters {
   region?: string;
 }
 
 /**
  * @internal
  */
-export async function defaultWeatherHttpAuthSchemeParametersProvider(
-    config: WeatherClientResolvedConfig,
-    context: HandlerExecutionContext
-): Promise<WeatherHttpAuthSchemeParameters> {
+export const defaultWeatherHttpAuthSchemeParametersProvider: HttpAuthSchemeParametersProvider<WeatherClientResolvedConfig, WeatherHttpAuthSchemeParameters> = async (config, context) => {
   return {
     operation: context.commandName,
     region: await normalizeProvider(config.region)() || (() => {
@@ -72,14 +70,12 @@
 /**
  * @internal
  */
-export interface WeatherHttpAuthSchemeProvider {
-  (authParameters: WeatherHttpAuthSchemeParameters): HttpAuthOption[];
-}
+export interface WeatherHttpAuthSchemeProvider extends HttpAuthSchemeProvider<WeatherHttpAuthSchemeParameters> {}
 
 /**
  * @internal
  */
-export function defaultWeatherHttpAuthSchemeProvider(authParameters: WeatherHttpAuthSchemeParameters): HttpAuthOption[] {
+export const defaultWeatherHttpAuthSchemeProvider: WeatherHttpAuthSchemeProvider = (authParameters) => {
   const options: HttpAuthOption[] = [];
   switch (authParameters.operation) {
     case "OnlyHttpApiKeyAuth": {

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been committed and included in this pull request. See CONTRIBUTING.md.

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