feat: Discourse 3.3.0 upgrade

[alithethird]

Updating to Discourse v3.3.0

Applicable spec: N/A

Overview

Upgrading the Discourse version from v3.2.0 to v.3.3.0
Added new part to install imagemagick from source because the used imagemagick is bumped to v7.1.1. Previously it was installed by apt and the version there is 6.9.

Rationale

Juju Events Changes

Module Changes

Library Changes

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)

[merkata]

This looks good, great work @alithethird ! I left two comments, they are about tidying up, so you can address them at a later point.

[github-actions]

Test coverage for 46f5963

Name              Stmts   Miss Branch BrPart  Cover   Missing
-------------------------------------------------------------
src/charm.py        371     41     94     15    88%   184, 192-193, 205, 337->345, 378->383, 395, 577-579, 584-585, 597-599, 604-605, 617-619, 642-644, 686->exit, 696->exit, 745-748, 758-759, 783-784, 796-797, 824-826, 828->833, 830-831, 873-874, 890-891, 901->exit, 915
src/database.py      29      1      8      1    95%   56
-------------------------------------------------------------
TOTAL               400     42    102     16    88%

Static code analysis report

Run started:2024-08-19 14:15:39.012250

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 2337
  Total lines skipped (#nosec): 2
  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):

[merkata]

lgtm