coreos-base/misc-files: add back BCC tools

[tormath1]

This file was not sourced because it does not have '.bash' or '.sh'
suffix.

Testing done

SSH into latest stable release:

core@localhost ~ $ alias
alias diff='diff --color=auto'
alias dir='dir --color=auto'
alias grep='grep --color=auto'
alias ls='ls --color=auto'
alias vdir='vdir --color=auto

Hot-fix:

core@localhost ~ $ sudo mv /etc/bash/bashrc.d/99-flatcar-bcc /etc/bash/bashrc.d/99-flatcar-bcc.bash

SSH back:

core@localhost ~ $ alias
alias diff='diff --color=auto'
alias dir='dir --color=auto'
alias grep='grep --color=auto'
alias iovisor-biolatency='docker run --rm -it -v /lib/modules:/lib/modules -v /sys/kernel/debug:/sys/kernel/debug -v /sys/fs/cgroup:/sys/fs/cgroup -v /sys/fs/bpf:/sys/fs/bpf --privileged --net host --pid host quay.io/iovisor/bcc /usr/share/bcc/tools/biolatency'
alias iovisor-tcpaccept='docker run --rm -it -v /lib/modules:/lib/modules -v /sys/kernel/debug:/sys/kernel/debug -v /sys/fs/cgroup:/sys/fs/cgroup -v /sys/fs/bpf:/sys/fs/bpf --privileged --net host --pid host quay.io/iovisor/bcc /usr/share/bcc/tools/tcpaccept'
alias iovisor-tcpconnect='docker run --rm -it -v /lib/modules:/lib/modules -v /sys/kernel/debug:/sys/kernel/debug -v /sys/fs/cgroup:/sys/fs/cgroup -v /sys/fs/bpf:/sys/fs/bpf --privileged --net host --pid host quay.io/iovisor/bcc /usr/share/bcc/tools/tcpconnect'
alias iovisor-tcpretrans='docker run --rm -it -v /lib/modules:/lib/modules -v /sys/kernel/debug:/sys/kernel/debug -v /sys/fs/cgroup:/sys/fs/cgroup -v /sys/fs/bpf:/sys/fs/bpf --privileged --net host --pid host quay.io/iovisor/bcc /usr/share/bcc/tools/tcpretrans'
alias ls='ls --color=auto'
alias vdir='vdir --color=auto'

• Changelog entries added in the respective changelog/ directory (user-facing change, bug fix, security fix, update)
• Inspected CI output for image differences: /boot and /usr size, packages, list files for any missing binaries, kernel modules, config files, kernel modules, etc.
• CI: http://jenkins.infra.kinvolk.io:8080/job/container/job/packages_all_arches/5951/cldsv/

[tormath1]

Cherry-picked to:

• flatcar-4284
• flatcar-4230
• flatcar-4152
• flatcar-4081

[github-actions]

Build action triggered: https://github.com/flatcar/scripts/actions/runs/14976529943