Backport of squid for jammy, noble and questing

[Lena Voytek]

[Impact]

This bug tracks the following MRE updates for the Squid package:

* <list of Ubuntu series and stable versions being introduced>

See <upstream-roadmap-link>

These updates are a best effort to only include bug fixes, following the
SRU policy exception defined at https://wiki.ubuntu.com/SquidUpdates.

[Major Changes]

* <list of series with link to release notes>
  - <Important bug fixes>
  - <CVEs fixes added, and note whether or not already applied in ubuntu>

[Test Plan]

See https://wiki.ubuntu.com/SquidUpdates#QA

Link the build log containing all tests being executed:
<build log link showing tests>
<test summary from the log>

(Other builds visible at <ppa link>)

All tests are passing during build time, as shown in the build log
(builds would fail otherwise, see LP: #2004050).

Results of local autopkgtest run against all the new Squid versions
being uploaded here:

<autopkgtest results and discussion of any failures>

Ran with ppa-dev-tools for build in <ppa link>

[Regression Potential]

Upstream tests are extensive and always executed during
build-time. Failures would prevent builds from succeeding.

Squid does not have many reverse dependencies. However, any upgrade is a
risk to introduce breakage to other packages. Whenever a regression
occurs in autopkgtests, we will investigate and provide fixes.

[Other Info]

This is a recurring effort. For reference, previous previous Squid SRU backports:

* LP: #2013423 5.7 for Jammy
* LP: #2040470 5.9 for Jammy
* LP: #2073322 6.10 for Noble
* <Add further bug links to more recent cases of SRU backports for this package>

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.