refactor: Replace yq with bbb-yq-go (based on debian yq-go)

[antobinary]

• In this PR we're switching back to mikefarah syntax but invoking yq-go, now added via bbb-yq-go package from BigBlueButton's packages repository.

bbb-yq-go (packaging mikefarah/yq binary from https://github.com/mikefarah/yq/releases) matches the mikefarah/yq syntax BigBlueButton relied on in previous BBB iterations under the name yq. When upgrading to Ubuntu 24.04 in #826 we tried adopting the tool called yq already present in Ubuntu 24.04. However, the syntax was different (overcome in #826 and bigbluebutton/bigbluebutton#24805) and the behavior turned out to not be identical either.

• I am including here a tweak to need_ppa as it was causing apt-key complaints and errors - discovered during the work on the PR

Reading package lists...
Repository: 'Types: deb
URIs: https://ppa.launchpadcontent.net/martin-uni-mainz/yq-go/ubuntu/
Suites: noble
Components: main
'
Description:
yq go builds and it build dependencies
More info: https://launchpad.net/~martin-uni-mainz/+archive/ubuntu/yq-go
Adding repository.
Found existing deb entry in /etc/apt/sources.list.d/martin-uni-mainz-ubuntu-yq-go-noble.sources
+ apt-key list 4B77C2225D3BBDB3
+ grep -q -E '1024|4096'
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
+ err 'Unable to setup PPA for ppa:martin-uni-mainz/yq-go'
+ say 'Unable to setup PPA for ppa:martin-uni-mainz/yq-go'
+ echo 'bbb-install: Unable to setup PPA for ppa:martin-uni-mainz/yq-go'
bbb-install: Unable to setup PPA for ppa:martin-uni-mainz/yq-go
+ exit 1
Error: Process completed with exit code 1.

Note, this matches bigbluebutton/bigbluebutton PR bigbluebutton/bigbluebutton#25398

Many thanks to @christmart who ported yq-go from Debian into a launchpad ppa. Initially I adopted that ppa but decided it's best for the project to be in control of which yq version we're using. See bigbluebutton/bigbluebutton#25398 for our packaging.

[antobinary]

I'm considering invalidating commands with yq only by adding:

# Ubuntu's archive 'yq' is the kislyuk/Python tool with different write semantics;
# BBB uses yq-go. Remove it so a stale 'yq …' fails loudly instead of misbehaving.
if dpkg -s yq >/dev/null 2>&1; then apt-get purge -y yq; fi

This should prevent people from going astray when following old commands. Any opinions?