feat: hot-reload TLS certificates

[alnr]

ory/hydra#2850 but for Kratos

[codecov[bot]]

Codecov Report

Merging #2744 (ee8f300) into master (bdc3797) will decrease coverage by 0.05%. The diff coverage is 92.85%.

@@            Coverage Diff             @@
##           master    #2744      +/-   ##
==========================================
- Coverage   75.22%   75.16%   -0.06%     
==========================================
  Files         294      294              
  Lines       17081    17082       +1     
==========================================
- Hits        12849    12840       -9     
- Misses       3253     3265      +12     
+ Partials      979      977       -2     

Impacted Files	Coverage Δ
driver/config/config.go	82.91% <91.66%> (+0.06%)	:arrow_up:
cmd/daemon/serve.go	86.63% <100.00%> (ø)
selfservice/strategy/oidc/strategy_registration.go	60.52% <0.00%> (-5.29%)	:arrow_down:
selfservice/flow/login/handler.go	78.40% <0.00%> (-2.85%)	:arrow_down:
selfservice/strategy/link/strategy_recovery.go	62.85% <0.00%> (+0.25%)	:arrow_up:
selfservice/strategy/oidc/strategy_login.go	68.91% <0.00%> (+1.38%)	:arrow_up:
x/http_secure_redirect.go	90.47% <0.00%> (+2.72%)	:arrow_up:

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