Pyright error if `import httomo` used instead of `import httomo.globals`

In some places in the codebase where the `httomo.globals` module is used, there is the following error from pyright:
```
"globals" is not a known attribute of module "httomo" [reportAttributeAccessIssue]
```

when accessing variables within `httomo.globals`.

This occurs if the module is accessed via an import doing `import httomo`, like in `test_cli.py`: https://github.com/DiamondLightSource/httomo/blob/3111f23de959f8521edd9024d32c25ebd3b67542/tests/test_cli.py#L88

but does not occur if the module is accessed via an import doing `import httomo.globals`.

This can be resolved by simply replacing `import httomo` with `import httomo.globals` in the relevant modules.