RUM 5764 [SR] Deprecate former SessionReplay Configuration API

What and why?

As part of the Fine Grained Masking (FGM) initiative (RFC), we are transitioning from a single PrivacyLevel to three distinct privacy levels: textAndInputPrivacyLevel, imagePrivacyLevel, and touchPrivacyLevel.

We now have a new API to create a Session Replay (SR) configuration using these new privacy levels, allowing us to deprecate the previous API.

How?

As part of this deprecation, we now rely on new privacy levels instead of PrivacyLevel.

This PR:

Updates the deprecated API to convert the PrivacyLevel parameter to the corresponding new privacy levels.
Replaces the use of PrivacyLevel with TextAndInputPrivacyLevel for text and input privacy in recorders.
Removes the setting of SWIFT_TREAT_WARNINGS_AS_ERRORS to NO in the makefile to prevent CI test failures due to deprecation warnings.
Updates all snapshot test images. This change only affects their names (e.g., testAlert()-mask-privacy.png became testAlert()-maskAll-privacy.png) due to the privacy level name used for the snapshot.

Notes

1) File Changes: Don't be frightened by the number of changed files; 70% are related to snapshot test updates.

2) Options and behavior of PrivacyLevel before FGM:

allow: Show all text except for sensitive input fields (e.g., password fields).
maskUserInput: Mask text for all input fields and components such as checkboxes, switches, or sliders.
mask: Mask all text and input components.

For images, non-bundled images are hidden on iOS, and large images are hidden on Android. Touches are always shown by default.

Moving forward, by converting PrivacyLevel to new privacy levels, the behavior will be slightly modified to the following:

PrivacyLevel: .allow -- textAndInputPrivacyLevel: .maskSensitiveInputs -- imagePrivacyLevel: .maskNone -- touchPrivacyLevel: .show
PrivacyLevel: .maskUserInput -- textAndInputPrivacyLevel: .maskAllInputs -- imagePrivacyLevel: .maskNonBundledOnly -- touchPrivacyLevel: .hide
PrivacyLevel: .mask -- textAndInputPrivacyLevel: .maskAll -- imagePrivacyLevel: .maskAll -- touchPrivacyLevel: .hide

Review checklist

[x] Feature or bugfix MUST have appropriate tests (unit, integration)
[x] Make sure each commit and the PR mention the Issue number or JIRA reference
[ ] Add CHANGELOG entry for user facing changes

DataDog / dd-sdk-ios