fix: skip top domain when cookie is disabled

[liuyang1520]

Summary

• fix: skip top domain when cookie is disabled
• remove the random ids in the test cookie

For test cookie, we have the random id each time when testing whether the cookie is enabled in the browser, this might introduce too many cookies if the remove operation gets any issue. Following the TS SDK, think we can just use the general key for testing purpose.

With disabledCookies set to true, we still have a topDomain function which still uses the cookies (base-cookie):

• move the getLocation and getHost to utils, so we can mock/stub the functions, otherwise as window.location is not writable/configurable, we cannot unit test the features, also moving these two standalone functions into utils for better readability.
• skip calling topDomain in MetadataStorage when cookies is disabled.
• this case is not testable in localhost as the domain doesn't have multiple levels.

Checklist

• Does your PR title have the correct title format?
• Does your PR have a breaking change?: No

[yuhao900914]

LGTM.