Fix KVSSigner iso8601() issue with 12-hour format

[Json031]

Issue #, if available:
If the phone's time format is set to a 12-hour system, the iso8601() method in KVSSigner returns a datetime string with a space, e.g., "20250315T73633 AMZ". This causes a crash at line 147 in KVSSigner, where components.percentEncodedQueryItems = queryParamsBuilderArray. This issue has been fixed.

Description of changes:
Fixed an issue in KVSSigner.iso8601() where the 12-hour time format included a space (e.g., "20250315T73633 AMZ"), causing a crash at line 147 when setting components.percentEncodedQueryItems.

Testing:

• Unit tests pass
• Manually tested the application with the JS test page, iOS, C SDK's - verified that we can see the media on both ends.

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[Json031]

@sirknightj @niyatim23 Could you please help review this PR? At least two approving reviews from reviewers with write access are required for merging. Thanks! 😄

[sirknightj]

Hi @Json031, thanks for the contribution. I was able to confirm the crash mentioned after changing the date format to 12 hours:

• Settings -> General -> Date & Time -> 24-Hour Time (OFF)

date: 20250325T52015 PMZ
Foundation/URLComponents.swift:1048: Fatal error: Attempting to set percentEncodedQueryItems with invalid characters

And after your changes, it connects successfully:

date: 20250325T172405Z
"Connection to signaling success."

[sirknightj]

Note: CI failing due to outdated configurations, can update in a future PR.