Add `userIdType` option to `@JWT` and `@UseSessions` and remove `fetchUser` interface and functions

[LoicPoullain]

Issue

See #1120

Solution and steps

• [x] Add userIdType option and change the interface of UseSessions.
• [x] Add userIdType option and change the interface of JWTxxx.
• [x] Remove the FetchUser interface and the fetchUser functions.

Checklist

• [ ] Add/update/check docs (code comments and docs/ folder).
• [x] Add/update/check tests.
• [x] Update/check the cli generators.

[codecov-commenter]

Codecov Report

Merging #1119 (f912ba5) into v3-0-0 (a16759e) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           v3-0-0    #1119   +/-   ##
=======================================
  Coverage   98.82%   98.83%           
=======================================
  Files          85       86    +1     
  Lines        1705     1719   +14     
  Branches      408      413    +5     
=======================================
+ Hits         1685     1699   +14     
  Misses         20       20           

Impacted Files	Coverage Δ
packages/core/src/index.ts	0.00% <ø> (ø)
...kages/core/src/sessions/http/check-user-id-type.ts	100.00% <100.00%> (ø)
...e/src/sessions/http/get-session-id-from-request.ts	100.00% <100.00%> (ø)
packages/core/src/sessions/use-sessions.hook.ts	98.82% <100.00%> (+0.02%)	:arrow_up:
packages/core/src/core/config/config.ts	94.28% <0.00%> (+0.05%)	:arrow_up:

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