Disable saml integration

[Thanhphan1147]

Spec : ISD-185 (internal)

As authentication will be handled by the Matrix Authentication Service, the saml integration will need to be removed. Future revisions of synapse will therefore no longer support the saml integration.

Authentication via SAML is possible with Dex serving as a bridge ( via the dex-auth charm ) which will be possible once the oauth integration is added.

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Manging Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)

[javierdelapuente]

nice, just removing code!

[amandahla]

Trivy vulnerability will be fixed here:
element-hq/synapse#17985

[github-actions]

Test coverage for e57cd83

Name                                    Stmts   Miss Branch BrPart  Cover   Missing
-----------------------------------------------------------------------------------
src/actions/__init__.py                     1      0      0      0   100%
src/actions/register_user.py               21      0      2      0   100%
src/admin_access_token.py                   9      0      0      0   100%
src/backup.py                             175      5     20      2    96%   353-354, 423-424, 481->483, 484
src/backup_observer.py                    134     16     12      0    89%   132-135, 140-143, 179-182, 211-214
src/charm.py                              286     20     70     11    91%   132->134, 137, 243, 247-248, 254-255, 276-277, 305, 312, 393-397, 400-401, 429-431, 451, 487-488
src/charm_state.py                        157      9     34      7    92%   270, 274, 295, 320, 326, 332, 336-337, 420
src/charm_types.py                         30      0      0      0   100%
src/database_client.py                     57      1      8      4    92%   35, 47->exit, 69->exit, 88->98
src/database_observer.py                   39      0      4      1    98%   70->72
src/exceptions.py                           3      0      0      0   100%
src/matrix_auth_observer.py                60      5     12      3    89%   61, 64, 143, 162-163
src/media_observer.py                      41      4      2      1    88%   61-63, 82
src/mjolnir.py                             97      3     30      3    95%   82, 91->107, 112-116
src/observability.py                       14      0      0      0   100%
src/pebble.py                             203     25     46     12    85%   57->62, 176->exit, 187-191, 225-226, 246-247, 300->305, 310-311, 323-324, 326-327, 360, 362, 364, 366, 368, 396, 448-453
src/redis_observer.py                      35      3      4      0    92%   62-65
src/s3_parameters.py                       22      0      4      0   100%
src/smtp_observer.py                       56      4     14      2    91%   82-86, 89, 108->113
src/synapse/__init__.py                     4      0      0      0   100%
src/synapse/admin.py                       19      2      2      0    90%   40-41
src/synapse/api.py                        175      3     20      3    97%   176, 229, 402
src/synapse/workload.py                   138      6     24      0    94%   401-402, 412-415
src/synapse/workload_configuration.py     148     26     34     12    79%   88->exit, 92-93, 141-142, 171, 191-192, 224-225, 258, 267-268, 283, 288-289, 310-311, 330->335, 336, 354->356, 366-367, 395, 403->405, 405->407, 412-413, 433->440, 443, 463-464
src/user.py                                23      0      2      0   100%
-----------------------------------------------------------------------------------
TOTAL                                    1947    132    344     61    91%

Static code analysis report

Working... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:00
Run started:2024-12-03 19:06:20.417336

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 10878
  Total lines skipped (#nosec): 4
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):