[PM-37648] Fix double HTML encoding in emergency access emails

[singhvishalkr]

Fixes #4845

When sending emergency access emails, names with special characters like German umlauts appear as HTML entities (e.g., Stephan Windmüller instead of Stephan Windmüller).

The root cause is double HTML encoding:

1. CoreHelpers.SanitizeForEmail(name) encodes the name (htmlEncode defaults to true)
2. Handlebars templates also escape values when rendering

Other email methods in the same file already pass false to avoid this (e.g., SendProviderInviteEmailAsync). This change applies the same pattern to all emergency access email methods:

• SendEmergencyAccessInviteEmailAsync
• SendEmergencyAccessConfirmedEmailAsync
• SendEmergencyAccessRecoveryInitiated
• SendEmergencyAccessRecoveryApproved
• SendEmergencyAccessRecoveryRejected
• SendEmergencyAccessRecoveryReminder
• SendEmergencyAccessRecoveryTimedOut

Tested by reviewing the code path and confirming the fix matches existing patterns.

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[bitwarden-bot]

Thank you for your contribution! We've added this to our internal tracking system for review.
ID: PM-37648
Link: https://bitwarden.atlassian.net/browse/PM-37648

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