[Documentation] DEPRECATION NOTICE for FALCO_BPF_PROBE for Falco 0.38 -> add info around what to do instead of using the env variable

[incertum]

What to document

The new deprecation warnings are awesome!

Wed Nov 29 01:44:29 2023: DEPRECATION NOTICE: 'syscall_drop_failed_exit' config is deprecated and will be removed in Falco 0.38! Use `engine.<driver>.drop_failed_exit' config instead
Wed Nov 29 01:44:29 2023: DEPRECATION NOTICE: 'syscall_buf_size_preset' config is deprecated and will be removed in Falco 0.38! Use `engine.<driver>.buf_size_preset' config instead
Wed Nov 29 01:44:29 2023: DEPRECATION NOTICE: 'modern_bpf.cpus_for_each_syscall_buffer' config is deprecated and will be removed in Falco 0.38! Use `engine.modern_ebpf.cpus_for_each_buffer' config instead
Wed Nov 29 01:44:29 2023: DEPRECATION NOTICE: the 'FALCO_BPF_PROBE' environment variable is deprecated and will be removed in Falco 0.38

One small request: Could we also tell end users what to do instead of using the 'FALCO_BPF_PROBE' environment variable? Thanks!

[Andreagit97]

One small request: Could we also tell end users what to do instead of using the 'FALCO_BPF_PROBE' environment variable?

Good point

if we all agree we can keep track of all the deprecations here #2840, i've update it :)
Note that breaking change in Falco 0.38.0 means deprecation in 0.37.0, this is done to avoid 2 issues with the same points

[Andreagit97]

can we close this in favor of #2840?