feat: jsonnet caching for OIDC claims mapper, webhooks, JWT session tokenizer

[alnr]

Requires ory/x#753

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (d93570d) 78.94% compared to head (087dc69) 78.33%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
session/tokenizer.go	83.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3701      +/-   ##
==========================================
- Coverage   78.94%   78.33%   -0.62%     
==========================================
  Files         347      346       -1     
  Lines       24553    23555     -998     
==========================================
- Hits        19384    18452     -932     
+ Misses       3746     3710      -36     
+ Partials     1423     1393      -30     

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[aeneasr]

LGTM, please just adjust the cache configs. Maybe it also makes sense to use a global cache instead of several individual caches at some point, to improve memory management.