Include Sentry meta tag in the layout automatically

[solnic]

Closes #2368

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.70%. Comparing base (3fb9b67) to head (4f0c759).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2369      +/-   ##
==========================================
+ Coverage   98.69%   98.70%   +0.01%     
==========================================
  Files         209      209              
  Lines       13845    13861      +16     
==========================================
+ Hits        13664    13682      +18     
+ Misses        181      179       -2     

Components	Coverage Δ
sentry-ruby	99.07% <ø> (+0.01%)	⬆️
sentry-rails	97.43% <100.00%> (+0.02%)	⬆️
sentry-sidekiq	97.01% <ø> (ø)
sentry-resque	96.79% <ø> (ø)
sentry-delayed_job	98.92% <ø> (ø)
sentry-opentelemetry	100.00% <ø> (ø)

Files	Coverage Δ
sentry-rails/lib/generators/sentry_generator.rb	100.00% <100.00%> (ø)
sentry-rails/spec/sentry/generator_spec.rb	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes