fix(pkg,cmd): eBPF probe must be symlinked under /root/.falco/falco-bpf.o

[FedeDP]

What type of PR is this?

/kind bug

Any specific area of the project related to this PR?

/area library
/area cli

What this PR does / why we need it:

Also, avoid mounting /sys/kernel/debug in bpf Cleanup method, since it makes no sense. It is actually part of the Build.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

[FedeDP]

Small bug lingered in with latest commits.

[FedeDP]

New output:

sudo ./falcoctl driver install --type ebpf
2023-12-06 17:42:05 INFO  Running falcoctl driver install
                      ├ driver version: 6.0.1+driver
                      ├ driver type: ebpf
                      ├ driver name: falco
                      ├ compile: true
                      ├ download: true
                      ├ arch: x86_64
                      ├ kernel release: 6.6.4-arch1-1
                      └ kernel version: #1 SMP PREEMPT_DYNAMIC Mon, 04 Dec 2023 00:29:19 +0000
2023-12-06 17:42:05 INFO  Found distro target: arch
2023-12-06 17:42:05 INFO  Trying to download a driver. url: https://download.falco.org/driver/6.0.1%2Bdriver/x86_64/falco_arch_6.6.4-arch1-1_1.o                                                                   
2023-12-06 17:42:05 WARN  Non-200 response from url. code: 404
2023-12-06 17:42:05 WARN  unable to find a prebuilt driver 
2023-12-06 17:42:05 INFO  Mounting debugfs for bpf driver.                                                                                                                                                         
2023-12-06 17:42:07 INFO  Copying built driver to its destination.
                      ├ src: /usr/src/falco-6.0.1+driver/bpf/probe.o
                      └ dst: /root/.falco/6.0.1+driver/x86_64/falco_arch_6.6.4-arch1-1_1.o
2023-12-06 17:42:07 INFO  Driver built. path: /root/.falco/6.0.1+driver/x86_64/falco_arch_6.6.4-arch1-1_1.o
2023-12-06 17:42:07 INFO  Symlinking eBPF probe src: /root/.falco/6.0.1+driver/x86_64/falco_arch_6.6.4-arch1-1_1.o dest: /root/.falco/falco-bpf.o
2023-12-06 17:42:07 INFO  eBPF probe symlinked 

[FedeDP]

/milestone v0.7.0

[poiana]

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This pull-request has been approved by: FedeDP, leogr

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