[Frontend] Improve consistency in entities headers (#13454)

[lndrtrbn]

Proposed changes

• Same size and spacing for all headers of entities

Related issues

• Improve Page Hierarchy #13454

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

[codecov]

Codecov Report

❌ Patch coverage is 0% with 54 lines in your changes missing coverage. Please review.
✅ Project coverage is 30.83%. Comparing base (317eb78) to head (72ce55b).
⚠️ Report is 33 commits behind head on release/current.

Files with missing lines	Patch %	Lines
...nt/src/private/components/settings/groups/Root.tsx	0.00%	8 Missing ⚠️
...ont/src/private/components/settings/roles/Root.tsx	0.00%	8 Missing ⚠️
...es/external_references/ExternalReferenceHeader.tsx	0.00%	6 Missing ⚠️
...components/settings/fintel_design/FintelDesign.tsx	0.00%	6 Missing ⚠️
...ont/src/private/components/settings/users/Root.jsx	0.00%	6 Missing ⚠️
...e/components/common/containers/ContainerHeader.jsx	0.00%	5 Missing ⚠️
...ivate/components/data/playbooks/PlaybookHeader.tsx	0.00%	5 Missing ⚠️
...ents/settings/case_templates/CaseTemplateTasks.tsx	0.00%	5 Missing ⚠️
...tform/opencti-front/src/components/Breadcrumbs.tsx	0.00%	3 Missing ⚠️
...c/components/common/typography/TitleMainEntity.tsx	0.00%	2 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                  @@
##           release/current   #13924       +/-   ##
====================================================
+ Coverage             2.58%   30.83%   +28.25%     
====================================================
  Files                 2127     2928      +801     
  Lines               109368   193503    +84135     
  Branches             29834    39735     +9901     
====================================================
+ Hits                  2825    59673    +56848     
- Misses              106543   133830    +27287     

Flag	Coverage Δ
opencti	30.83% <0.00%> (+28.25%)	⬆️
opencti-front	2.75% <0.00%> (+0.16%)	⬆️
opencti-graphql	68.23% <ø> (?)

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[esrevi]

lgtm