CE-2167: Remove manual start tests

See merge request !113

Due to changes in how we export IOC enabled state from ics-ans-rol-ioc-exporter,
the tests for the manual started IOCs no longer work. However, this is not
something that we actually support any longer so it seems simplest to just delete
the tests. Note that this will _slightly_ speed up the tests as well.

CE-235: Switch to using mocked nfs server

See merge request !110

This IOC served two testing purposes:
* Test that require 3.4.1 still loaded env.sh
* Test that ioc.json loads correctly

The first test can be removed as we are no longer supporting require 3.4.1,
while the second test need not be in a dedicated IOC that only exists for
that purpose; as such, its generic configuration has been moved to another
IOC to implicitly (as was being done already) test that ioc.json loads the
correct metadata.

We will remove support for older versions of EPICS base and require
from this point forwards.

Note that unlike the lab NFS share (which has several e3 environments),
this vagrant box is intended to be minimal, and will only have a limited
number of e3 environments (in particular, it will not have both
* EPICS base 7.0.5/require 3.4.0
* EPICS base 7.0.5/require 3.4.1

ICSHWI-11983: Remove pv-exporter tests

See merge request !109

ICSHWI-11805: Update activation script to support require 5

See merge request !107

In require 5.0.0 we accidentally removed `afterInit`; this has been
added to essioc in order to allow everything to work correctly. However,
`afterInit` was needed in order to set the running indicator and it is
not obvious to see how to set it without the use of afterInit.

The running indicator, however, was not actually used by anything, so
it seems safe to remove it at the moment.

The main change is that we now use bin/activate instead of setE3Env.bash

Updated pre-commit to use ruff instead of isort/flake

See merge request !106

ICSHWI-10969: Replace metadata.yml with metadata.json

See merge request !105

Note that we need to sort the keys in order to ensure that the output
json data is consistent between runs.

ICSHWI-10917: Remove ENGINEER from deployment

See merge request !104

Remove cell mode from the deployment tool

See merge request !103

Cell mode has previously only been allowed for require < 4.0.0.
During the current maintenence window, we are removing it completely.
Most of this is simply modifying the molecule setups.

Unpin the dependent roles

See merge request !102

ICS-418: Always force clone of IOC repositories

See merge request !101

Note that we will shortly be removing cell mode support entirely, so this
is a more minor change than it appears.

See 365d604d
and https://jira.esss.lu.se/browse/ICSHWI-6668 for more context.

ICSHWI-9859: Support reading ioc.json

See merge request !100

ioc-exporter needs to support reading from `ioc.json` too