Linux disk encryption: frontend changes, backend missing private key errors, remove disk encryption endpoints dependence on MDM being enabled

[jacobshandling]

Addresses #22702, #23713, #23756, #23747, and #23876

-Note that much of this code as is will render as expected only once integrated with the backend or if manipulated manually for testing purposes

Frontend:

• Update banners on my device page, tests
• Build new logic for calling endpoint to trigger linux key escrow on clicking Create key
• Add CreateLinuxKeyModal to inform user of next steps after clicking Create key
• Update banners on host details page, tests
• Update the Controls > OS settings section with new logic related to linux disk encryption
• Expect and include counts of Linux hosts in aggregate disk encryption stats UI
• Add "Linux" column to the disk encryption table
• Show disk encryption related UI for supported Linux platforms
  • TODO: confirm platform string matching functionality in manual e2e testing
• Expand capabilities of SectionHeader component, apply to new UI
• Flash "missing private key" error, with clickable link, when trying to update disk encryption enabled while no server private key is present.
  • TODO: QA this once other endpoints on Controls > Disk encryption are enabled even when MDM not turned on
• Update Disk encryption key modal copy

-Other TODO:

• Confirm when integrated with API:
  • Aggregate disk encryption counts
  • Disk encryption table Linux column
  • Show disk encryption key action on host details page when expected
  • Opens Disk encryption key modal, displays key as expected

Backend:

• For "No team" and teams, error when trying to update disk encryption enabled while no server private key is present.

• Remove requiring mdm to be enabled from 3 endpoint operations

• Changes file added for user-visible changes in changes/

• Added/updated tests

• Manual QA for all new/changed functionality

  • Full e2e testing to do when integrated with backend

[codecov]

Codecov Report

Attention: Patch coverage is 50.39370% with 63 lines in your changes missing coverage. Please review.

Project coverage is 63.16%. Comparing base (e27e916) to head (f1ee144).

Files with missing lines	Patch %	Lines
...ngsModal/OSSettingsTable/OSSettingsTableConfig.tsx	6.66%	14 Missing ⚠️
frontend/services/entities/disk_encryption.ts	6.66%	14 Missing ⚠️
...es/hosts/details/DeviceUserPage/DeviceUserPage.tsx	33.33%	10 Missing ⚠️
...es/hosts/details/cards/HostSummary/HostSummary.tsx	65.38%	9 Missing ⚠️
frontend/pages/hosts/details/helpers.ts	40.00%	6 Missing ⚠️
...erPage/CreateLinuxKeyModal/CreateLinuxKeyModal.tsx	33.33%	4 Missing ⚠️
frontend/interfaces/mdm.ts	33.33%	2 Missing ⚠️
frontend/utilities/endpoints.ts	0.00%	2 Missing ⚠️
frontend/interfaces/platform.ts	94.11%	1 Missing ⚠️
...components/DeviceUserBanners/DeviceUserBanners.tsx	92.85%	1 Missing ⚠️

Additional details and impacted files

@@                    Coverage Diff                     @@
##           22074-linux-encryption   #23714      +/-   ##
==========================================================
- Coverage                   63.17%   63.16%   -0.02%     
==========================================================
  Files                        1559     1561       +2     
  Lines                      148227   148305      +78     
  Branches                     3722     3754      +32     
==========================================================
+ Hits                        93642    93676      +34     
- Misses                      47188    47232      +44     
  Partials                     7397     7397              

Flag	Coverage Δ
frontend	52.61% <50.39%> (-0.02%)	⬇️

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The base branch was changed.