Add possibility to fix the room state using resolve-state

[S7evinK]

This adds a room_id and a fix flag to resolve-state.

When using room_id, resolve-state will ignore all snapshot NIDs passed to it and use all existing snapshots NIDs stored in the database to resolve the current state of a room.
If passed the fix flag, it will create a new snapshot containing the resolved state. (only after confirming the user knows what they are doing)

[codecov]

Codecov Report

Attention: 24 lines in your changes are missing coverage. Please review.

Comparison is base (7863a40) 65.50% compared to head (2a09c26) 65.44%.

❗ Current head 2a09c26 differs from pull request most recent head 8588850. Consider uploading reports for the commit 8588850 to get more accurate results

Files	Patch %	Lines
...oomserver/storage/postgres/state_snapshot_table.go	5.26%	18 Missing ⚠️
roomserver/storage/postgres/storage.go	0.00%	2 Missing ⚠️
roomserver/storage/sqlite3/state_snapshot_table.go	0.00%	2 Missing ⚠️
roomserver/storage/sqlite3/storage.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3249      +/-   ##
==========================================
- Coverage   65.50%   65.44%   -0.07%     
==========================================
  Files         507      507              
  Lines       57291    57223      -68     
==========================================
- Hits        37531    37449      -82     
- Misses      15914    15924      +10     
- Partials     3846     3850       +4     

Flag	Coverage Δ
unittests	49.43% <4.00%> (-0.08%)	⬇️

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[S7evinK]

Example output:

$ go run ./cmd/resolve-state/main.go -room_id '!OGEhHVWSdvArJzumhm:matrix.org' -filtertype 'm.room.name' -fix
Opening database
Room version 5
Fetching 359 snapshot NIDs
  358 of 359
Fetching 108480 state events
Fetching 67885 auth events
Resolving state
Resolved state contains 102535 events

* $cmfAyePJH4n7AnzWDGlJyS6g3RRkNDOGBTtbnTrWgzs m.room.name ""
  {"name":"Matrix HQ"}

Returned 1 state events after filtering

                 !!! WARNING !!!
Attempting to fix the state of a room can make things even worse.
For the best result, please shut down Dendrite to avoid concurrent database changes.
If you have missing state events (e.g. users not in a room, missing power levels
make sure they would be added by checking the resolved state events above first (or by running without -fix).
If you are sure everything looks fine, press Return, if not, press CTRL+c.

Attempting to fix state
Successfully set new snapshot NID 216980 containing 102535 state events

[S7evinK]

Tried to fix the state for #dendrite with this, managed to get myself reset out of the room 🙃

[S7evinK]

Closing this for now, not working as intended. May revisit later.