[core] Fix typescript:ci failures

[LukasTy]

A follow up on #6381 (review) due to again consistently failing tsc

Try not to use nx as a runner as it seems to also solve the problem as well as reducing concurrency even lower.

[mui-bot]

	Messages
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These are the results for the performance tests:

Test case	Unit	Min	Max	Median	Mean	σ
Filter 100k rows	ms	1,124.2	1,534.2	1,288.7	1,283.68	152.04
Sort 100k rows	ms	1,042	1,535.9	1,460.5	1,360.16	182.997
Select 100k rows	ms	337.7	513.3	413.1	415.26	56.59
Deselect 100k rows	ms	220.4	570.2	297.2	329.08	124.082

Generated by 🚫 dangerJS against 8324d3a

[cherniavskii]

I think I have the same issue in #6707 (comment)
https://app.circleci.com/pipelines/github/mui/mui-x/27010/workflows/4ff804a5-aeff-4654-be7b-ca15667edc43/jobs/155299

[cherniavskii]

It might be caused by the recent lerna upgrade #6533 and the fact that nx is now used by default.
We can try adding "useNx": false in lerna.json

[LukasTy]

@cherniavskii It seems to have also solved the problem.
The only difference is that it is slower by a few seconds than 5 concurrent runners with nx. 😃

Done in 95.91s.

Done in 100.80s.

[cherniavskii]

The only difference is that it is slower by a few seconds than 5 concurrent runners with nx.

If we stick with nx, it will also be used for publishing packages.
For now, I would propose disabling it to avoid potential issues in the release process.
We can explore nx later.