fix: SAML "Overwrite user fullname" setting is not being honored

[matheusbsilva137]

Proposed changes (including videos or screenshots)

• Check for SAML "Overwrite user fullname" setting before updating a user identity coming from a SAML login.
• Add end-to-end tests to validate that names are only overwritten when the setting is enabled (and also to make sure they won't be updated along with the username when the latter is changed)

Issue(s)

Steps to test or reproduce

1. Create a user in RC;
2. Login using SAML with a user that has the same name or username (following the "Immutable field name" setting in SAML > General > Behavior ) as the previously created user, but a distinct name;

Expected behavior: the user's full name should only be updated/overwritten in case the "Overwrite user fullname (use idp attribute)" setting is enabled. Otherwise, it shouldn't be changed (even if the username is updated on login).
Current behavior the user's full name is updated regardless of the "Overwrite user fullname (use idp attribute)" setting.

Further comments

SUP-605

[dionisio-bot]

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[changeset-bot]

🦋 Changeset detected

Latest commit: dbd0e88

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 32 packages

Name	Type
@rocket.chat/meteor	Patch
@rocket.chat/core-typings	Patch
@rocket.chat/rest-typings	Patch
@rocket.chat/apps	Patch
@rocket.chat/core-services	Patch
@rocket.chat/cron	Patch
@rocket.chat/fuselage-ui-kit	Patch
@rocket.chat/gazzodown	Patch
@rocket.chat/livechat	Patch
@rocket.chat/model-typings	Patch
@rocket.chat/ui-contexts	Patch
@rocket.chat/account-service	Patch
@rocket.chat/authorization-service	Patch
@rocket.chat/ddp-streamer	Patch
@rocket.chat/omnichannel-transcript	Patch
@rocket.chat/presence-service	Patch
@rocket.chat/queue-worker	Patch
@rocket.chat/stream-hub-service	Patch
@rocket.chat/api-client	Patch
@rocket.chat/license	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/pdf-worker	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/uikit-playground	Patch
@rocket.chat/models	Patch
@rocket.chat/ui-avatar	Patch
@rocket.chat/ui-client	Patch
@rocket.chat/ui-video-conf	Patch
@rocket.chat/web-ui-registration	Patch
@rocket.chat/instance-status	Patch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.53%. Comparing base (f5e0d1e) to head (dbd0e88).
Report is 3 commits behind head on develop.

Additional details and impacted files

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+ Misses       21106    21101       -5     
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Flag	Coverage Δ
e2e	56.20% <ø> (-0.01%)	⬇️
e2e-api	41.32% <ø> (-0.04%)	⬇️
unit	72.15% <ø> (ø)

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