This commit refactors the internal package httpauth.

The auth file is renamed to nonce as Auth struct and its funcs are removed as they are no longer used.

Only Nonce and it's funcs remain hence the name of the file is changed to nonce.

This commit removes the funcs WithinTimeout() and NoErrorN() as they are no longer in use.

This commit removes the reuseClient field from the Client struct as well as the funcs that used it along with the func Header() as it was not used anymore.

The reuse client functionality is not used anymore hence it is being removed.

This commit renames the func extractError() to extractHTTPError() and adds a new global func ExtractError().

The func extractError() is removed from internal/utclient and pkg/addrresolver nad they instead use the func ExtractError() from internal/httpauth.

This commit removes the noise_credentials file along with the func WrapRWWithNoise() as it is not being used anymore.