new(falco): print system info when Falco starts

[Andreagit97]

What type of PR is this?

/kind feature

Any specific area of the project related to this PR?

/area engine

What this PR does / why we need it:

This PR helps maintainers in triaging issues and users in reporting effective info on issues. The idea is to print the content of /proc/version in the Falco startup messages @FedeDP

Mon Nov 27 15:48:06 2023: Falco version: 0.37.0-155+6095d10 (x86_64)
Mon Nov 27 15:48:06 2023: Falco initialized with configuration file: ../falco.yaml
Mon Nov 27 15:48:06 2023: System info: Linux version 6.2.0-37-generic (buildd@bos03-amd64-055) (x86_64-linux-gnu-gcc-11 (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #38~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov  2 18:01:13 UTC 2
Mon Nov 27 15:48:06 2023: Loading rules from file ../rules/falco_rules.yaml
Mon Nov 27 15:48:06 2023: The chosen syscall buffer dimension is: 8388608 bytes (8 MBs)
Mon Nov 27 15:48:06 2023: Starting health webserver with threadiness 8, listening on 0.0.0.0:8765
Mon Nov 27 15:48:06 2023: Loaded event sources: syscall
Mon Nov 27 15:48:06 2023: Enabled event sources: syscall
Mon Nov 27 15:48:06 2023: Opening 'syscall' source with BPF probe. BPF probe path: /root/.falco/falco-bpf.o

In case we are not able to read under /proc/version we provide a log but we don't fail

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

new(falco): print system info when Falco starts

[FedeDP]

Love this! It will make debugging driver related issues a little better!
/approve

[poiana]

LGTM label has been added.

Git tree hash: 84a781ae983938e4e77358da50be471a90f8e0ee

[incertum]

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, FedeDP, incertum

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