even lighter version of #17938: fix most issues with UnusedImport, XDeclaredButNotUsed, etc; fix #17511, #17510, #14246 (without realModule) (#18362)

* {.used: symbol}

* add tests

* fix tests with --import

* --import works without giving spurious unused warnings

* new warning warnDuplicateModuleImport for `import foo; import foo`

* fix test, add resolveModuleAlias, use proper line info for module aliases

* fix spurious warnings

* fix deprecation msg for deprecated modules even with `import foo as bar`

* disable a test for i386 pending sorting XDeclaredButNotUsed errors

* UnusedImport now works with re-exported symbols

* fix typo [skip ci]

* ic support

* add genPNode to allow writing PNode-based compiler code similarly to `genAst`

* fix DuplicateModuleImport warning

* adjust test

* fixup

* fixup

* fixup

* fix after rebase

* fix for IC

* keep the proc inline, move the const out

* [skip ci] fix changelog

* experiment: remove calls to resolveModuleAlias

* followup

* fixup

* fix tests/modules/tselfimport.nim

* workaround tests/deprecated/tmodule1.nim

* fix properly

* simplify

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/modules/tselfimport.nim b/tests/modules/tselfimport.nim
index 7e50bef7c..ba5d9b4cf 100644
--- a/tests/modules/tselfimport.nim
+++ b/tests/modules/tselfimport.nim
@@ -1,5 +1,5 @@
 discard """
-  errormsg: "A module cannot import itself"
+  errormsg: "module 'tselfimport' cannot import itself"
   file: "tselfimport.nim"
   line: 7
 """