Don't log warnings about missing deps when profiling is not enabled

[solnic]

Quick follow-up after #2537

I really tried to do it without introducing a new method but it was hopeless. I also think we need a robust mechanism for checking if a 3rd party dep is present and this is the first step in that direction.

Refs #2534

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 69.34%. Comparing base (b5a4948) to head (ffe4f77).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
sentry-ruby/lib/sentry-ruby.rb	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2542      +/-   ##
==========================================
- Coverage   69.40%   69.34%   -0.06%     
==========================================
  Files         126      126              
  Lines        4723     4727       +4     
==========================================
  Hits         3278     3278              
- Misses       1445     1449       +4     

Components	Coverage Δ
sentry-ruby	60.12% <75.00%> (-0.07%)	⬇️
sentry-rails	97.48% <ø> (ø)
sentry-sidekiq	95.52% <ø> (-0.38%)	⬇️
sentry-resque	92.64% <ø> (ø)
sentry-delayed_job	95.65% <ø> (ø)
sentry-opentelemetry	100.00% <ø> (ø)

Files with missing lines	Coverage Δ
sentry-ruby/lib/sentry/configuration.rb	85.51% <100.00%> (-0.35%)	⬇️
sentry-ruby/lib/sentry-ruby.rb	67.55% <50.00%> (-0.16%)	⬇️

... and 2 files with indirect coverage changes