OAS: Authorization header is always converted to lowercase

[LukasZech]

The function SecurityScheme.createAuthorizationHeader always converts the header key of the authorization schema to lowercase

har-sdk/packages/oas/src/converter/security/schemas/SecuritySchema.ts

Lines 37 to 40 in baae5b4

	return this.createKeyValuePair(
	httpAuthSchema.toLowerCase(),
	`${prefix}${prefix ? ' ' : ''}${value}`
	);

Although header keys are to be treaded as case-insensitive according to RFC2616 many server implementations will still compare header keys in a case sensitive way, especially with authorization headers

Even in official documents like RFC6750 the Authorization header is written in uppercase.

As there is no real need for this library to enforce HTTP headers beeing lowercase, I would propose to remove the conversation and simply take the header key as it is stored in the schema