🎨 [RUM-5019] Harmonize test mocks

[amortemousque]

Motivation

Our tests require to mock native APIs, we sometimes calls them stub or mock without a clear understanding of the different (ex: stubStorage.ts, mockLocation.ts).

This PR harmonize the namings of mocks for every test helper located in test/emulate

Changes

Rename:

• stubReportApis => mockReportingObserver
• stubZoneJs => mockZoneJs
• syntheticsWorkerValues => mockSyntheticsWorkerValues
• initEventBridgeStub => mockEventBridge
• subFetch => mockFetch
• stubXHR => mockXHR
• stubStorages => mockStorage (transform object providers in function)

Split: test/requests.ts => test/emulate/mockFetch.ts, test/emulate/mockXhr.ts and test/interceptRequests.ts

Testing

• [x] Local
• [ ] Staging
• [x] Unit
• [ ] End to end

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I have gone over the contributing documentation.

[cit-pr-commenter[bot]]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	160.50 KiB	160.50 KiB	0 B	0.00%	✅
Logs	58.09 KiB	58.09 KiB	0 B	0.00%	✅
Rum Slim	109.02 KiB	109.02 KiB	0 B	0.00%	✅
Worker	25.21 KiB	25.21 KiB	0 B	0.00%	✅

🚀 CPU Performance

| Action Name | Base Average Cpu Time (ms) | Local Average Cpu Time (ms) | 𝚫 | | --- | --- | --- | --- | | addglobalcontext | 0.002 | 0.002 | -0.000 | | addaction | 0.041 | 0.061 | 0.020 | | adderror | 0.035 | 0.059 | 0.025 | | addtiming | 0.001 | 0.001 | 0.000 | | startview | 1.366 | 1.753 | 0.387 | | startstopsessionreplayrecording | 1.314 | 1.326 | 0.012 | | logmessage | 0.025 | 0.021 | -0.004 |

🧠 Memory Performance

| Action Name | Base Consumption Memory (bytes) | Local Consumption Memory (bytes) | 𝚫 (bytes) | | --- | --- | --- | --- | | addglobalcontext | 21.76 KiB | 23.10 KiB | 1.34 KiB | | addaction | 72.60 KiB | 71.97 KiB | -652 B | | adderror | 87.25 KiB | 87.52 KiB | 277 B | | addtiming | 19.85 KiB | 21.02 KiB | 1.17 KiB | | startview | 313.18 KiB | 320.31 KiB | 7.13 KiB | | startstopsessionreplayrecording | 16.31 KiB | 16.04 KiB | -276 B | | logmessage | 70.97 KiB | 69.23 KiB | -1782 B |

🔗 RealWorld