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 0b01eddace).

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.

tests/effects/tstrict_funcs.nim

@@ -3,18 +3,6 @@ discard """
 """
 
 import tables, streams, parsecsv
-# We import the below modules to check that they compile with `strictFuncs`.
-# They are otherwise unused in this file.
-import
-  complex,
-  critbits,
-  httpcore,
-  math,
-  nre,
-  rationals,
-  sequtils,
-  strutils,
-  uri
 
 type
   Contig2Reads = TableRef[string, seq[string]]