strictFuncs+views: add test that imports stdlib modules (#16878)

This commit attempts to improve testing of strictFuncs and views, and
prevent regressions like #16873 (resolved by 0b01eddace6a).

We previously only explicitly tested strictFuncs and views with a
smaller number of stdlib modules, mostly in:
- tests/effects/tstrict_funcs.nim
- tests/views/tcan_compile_nim.nim

Note that this commit leaves the `pegs` module commented out; it
cannot currently be compiled with `--experimental:views` (see #16892).

Note also that this commit is not sufficient to test strictFuncs and
views, but it does detect a subset of problems.

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