Fix some test runs

See merge request !1378

Typo fix, again

See merge request !1377

Typo fix, again

See merge request !1376

Try switching it back to Poetry with the env use statement

See merge request !1375

Typo fix

See merge request !1374

Typo fix

See merge request !1373

Another try, this time without Poetry for the "install" step and only for the...

See merge request !1372

Another try, this time without Poetry for the "install" step and only for the "build" and "publish" steps

Fix the test command, rename pex build to package build and fix references

See merge request !1371

Fixing lock files

See merge request !1370

Correct the pex build template

See merge request !1369

Removing tests

See merge request !1368

Another try

See merge request !1367

Another try

See merge request !1366

Fixing build

See merge request !1365

Another try

See merge request !1364

Adding pytest dependency

See merge request !1363

Modify the core sampler install script

See merge request !1362

Modify the core sampler install script

See merge request !1361

Modify the core sampler install script

See merge request !1360