Add UEFI log handler, use it to send UEFI count

[sarroutbi]

Resolves: #1020

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 43 lines in your changes missing coverage. Please review.

Project coverage is 69.98%. Comparing base (07167a0) to head (52128d5).
Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
keylime/src/uefi/uefi_log_handler.rs	77.77%	32 Missing ⚠️
keylime-push-model-agent/src/struct_filler.rs	53.33%	7 Missing ⚠️
keylime/src/config/push_model_config.rs	69.23%	4 Missing ⚠️

Additional details and impacted files

Flag	Coverage Δ
e2e-testsuite	69.98% <75.00%> (+0.06%)	⬆️
upstream-unit-tests	69.98% <75.00%> (+0.06%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
keylime/src/keylime_error.rs	62.96% <ø> (ø)
keylime/src/structures/capabilities_negotiation.rs	71.42% <ø> (ø)
keylime/src/config/push_model_config.rs	91.11% <69.23%> (-4.30%)	⬇️
keylime-push-model-agent/src/struct_filler.rs	83.50% <53.33%> (-5.52%)	⬇️
keylime/src/uefi/uefi_log_handler.rs	77.77% <77.77%> (ø)

... and 5 files with indirect coverage changes

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[sarroutbi]

/packit retest-failed