[PM-28781] Remove Send UI refresh feature flag

[mcamirault]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/PM-28178

📔 Objective

This PR removes all display logic behind the pm-28175-send-ui-refresh feature flag from our clients

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 30.00000% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 47.46%. Comparing base (0345984) to head (fe314fc).
⚠️ Report is 29 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
apps/web/src/app/tools/send/send.component.ts	0.00%	4 Missing ⚠️
...tools/send/new-send/new-send-dropdown.component.ts	50.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #20753   +/-   ##
=======================================
  Coverage   47.46%   47.46%           
=======================================
  Files        4003     4003           
  Lines      123145   123128   -17     
  Branches    18945    18940    -5     
=======================================
- Hits        58447    58441    -6     
+ Misses      60272    60261   -11     
  Partials     4426     4426           

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