chore(repo): disable parallelism for nx-dev:build-base and separate it from `test` tasks

[FrozenPandaz]

Current Behavior

Running nx-dev:build-base takes a lot of memory and particularly if it is run after test tasks, it will cause agents to run out of memory.

Expected Behavior

I don't have a fix for the task taking up a lot of memory... but I do have a fix which will alleviate the issue. I've split up test tasks and nx-dev:build-base to run on different agents.

We should still look into how to make this task not take up so much memory. What I've learned is that prerendering pages for nx-dev has a memory leak so we should investigate what during prerendering a page is not cleaned up properly.

Related Issue(s)

Fixes #

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Name	Status	Preview	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	Nov 13, 2024 2:26pm

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✅ Successfully ran 4 targets

- [`nx affected --targets=lint,test,build,e2e,e2e-ci --base=dbaeb861023f2cd771ab3241ba9da059309e1fb2 --head=1b9e486c6f6f16f0d665f3a527f02036f324de0a --parallel=3`](https://staging.nx.app/runs/F9dPi1YSxs?utm_source=pull-request&utm_medium=comment) - [`nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte`](https://staging.nx.app/runs/bmYP8LOkbP?utm_source=pull-request&utm_medium=comment) - [`nx-cloud record -- nx format:check --base=dbaeb861023f2cd771ab3241ba9da059309e1fb2 --head=1b9e486c6f6f16f0d665f3a527f02036f324de0a`](https://staging.nx.app/runs/dJ00UTcafh?utm_source=pull-request&utm_medium=comment) - [`nx documentation --no-dte`](https://staging.nx.app/runs/q6vSCzUYy2?utm_source=pull-request&utm_medium=comment)

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