Test helper parity and method renaming

Description

This PR:

Updates the RealNetworkService getResponse method to not include an await in the logic, instead returning results immediately, and relying on assertAllNetworkRequestExpectations to perform awaits
- Android implementation for reference: https://github.com/adobe/aepsdk-edge-android/blob/8401adc864abe892cfa0099bada2919ccf09742a/code/test-utils/src/main/java/com/adobe/marketing/mobile/util/RealNetworkService.kt#L92
Adds method documentation to a lot of the test helper methods, and standardizes language
- Removes specific class names from top level method descriptions, instead placing them in the param descriptions when needed - intent is to explain what the method does in a general way
Renames a lot of methods to be more Swifty and hopefully more intuitive; since these methods are already strongly tied to the Mock/RealNetworkService, a lot of the redundant networkRequest method and param names can probably be omitted without affecting clarity of intent.

MockNetworkService

Before	After
`getMockResponseFor(networkRequest:)`	`getMockResponse(for:)`
`setMockResponseFor(networkRequest:responseConnection:)`	`setMockResponse(for:responseConnection:)`
`setMockResponseFor(url:httpMethod:responseConnection:)`	`setMockResponse(url:httpMethod:responseConnection:)`

NetworkRequestHelper

Before	After
`getSentNetworkRequestsMatching(networkRequest:)`	`getSentRequests(matching:)`
`setResponseFor(networkRequest:responseConnection:)`	`setResponse(for:responseConnection:)`
`getResponseFor(networkRequest:)`	`getResponse(for:)`
`setExpectationForNetworkRequest(networkRequest:...)`	`setExpectation(for:...)`
`timeout`	`expectationTimeout`

getNetworkRequestsWith and awaitRequest parameter timeout -> expectationTimeout (as this timeout only applies if there is already an expectation set on the network request, if there is no expectation this timeout value is not used and the default timeout is used instead)

RealNetworkService

Before	After
`getResponseFor(networkRequest:timeout:)`	`getResponse(for:)`
`setExpectationForNetworkRequest(networkRequest:...)`	`setExpectation(for:...)`

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

[ ] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

[ ] I have signed the Adobe Open Source CLA.
[ ] My code follows the code style of this project.
[ ] My change requires a change to the documentation.
[ ] I have updated the documentation accordingly.
[ ] I have read the CONTRIBUTING document.
[ ] I have added tests to cover my changes.
[ ] All new and existing tests passed.

adobe / aepsdk-edge-ios

Test helper parity and method renaming #405